kernel: Move to Linux v5.4.68-openpower1

This changes the defconfig to make OPAL_I2C=y, so IMA can work
correctly. See the mailing list[1] or the commit message for the
details.

PowerPC related fixes since 5.4.48:

 powerpc/dma: Fix dma_map_ops::get_required_mask
 powerpc/book3s64/radix: Fix boot failure with large amount of guest memory
 vgacon: remove software scrollback support
 powerpc/perf: Fix crashes with generic_compat_pmu & BHRB
 powerpc/perf: Fix soft lockups due to missed interrupt accounting
 powerpc/spufs: add CONFIG_COREDUMP dependency
 powerpc/xive: Ignore kmemleak false positives
 powerpc/64s: Don't init FSCR_DSCR in __init_FSCR()
 powerpc: Fix circular dependency between percpu.h and mmu.h
 powerpc: Allow 4224 bytes of stack expansion for the signal frame
 powerpc/ptdump: Fix build failure in hashpagetable.c
 powerpc/boot: Fix CONFIG_PPC_MPC52XX references
 powerpc/perf: Fix missing is_sier_aviable() during build
 powerpc/book3s64/pkeys: Use PVR check instead of cpu feature
 powerpc/vdso: Fix vdso cpu truncation
 powerpc/rtas: don't online CPUs for partition suspend
 Revert "powerpc/kasan: Fix shadow pages allocation failure"
 powerpc/pseries/svm: Fix incorrect check for shared_lppaca_size
 powerpc/book3s64/pkeys: Fix pkey_access_permitted() for execute disable pkey
 scsi: sr: remove references to BLK_DEV_SR_VENDOR, leave it enabled
 powerpc: Fix kernel crash in show_instructions() w/DEBUG_VIRTUAL
 powerpc/64s/pgtable: fix an undefined behaviour
 powerpc/64s/exception: Fix machine check no-loss idle wakeup
 powerpc/64: Don't initialise init_task->thread.regs
 powerpc/crashkernel: Take "mem=" option into account
 powerpc/perf/hv-24x7: Fix inconsistent output values incase multiple hv-24x7 events run
 powerpc/ptdump: Add _PAGE_COHERENT flag
 powerpc/kasan: Fix stack overflow by increasing THREAD_SHIFT

[1] https://lists.ozlabs.org/pipermail/openpower-firmware/2020-September/000547.html

Signed-off-by: Joel Stanley <joel@jms.id.au>
diff --git a/openpower/linux/0017-powerpc-configs-Update-to-upstream-and-enable-secure.patch b/openpower/linux/0017-powerpc-configs-Update-to-upstream-and-enable-secure.patch
index 881253c..3fbe01a 100644
--- a/openpower/linux/0017-powerpc-configs-Update-to-upstream-and-enable-secure.patch
+++ b/openpower/linux/0017-powerpc-configs-Update-to-upstream-and-enable-secure.patch
@@ -1,7 +1,7 @@
 From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
 From: Joel Stanley <joel@jms.id.au>
 Date: Tue, 23 Jun 2020 16:22:10 +0930
-Subject: [PATCH 17/18] powerpc/configs: Update to upstream and enable
+Subject: [PATCH 17/19] powerpc/configs: Update to upstream and enable
  secureboot
 
 Pulls in the following updates from upstream:
@@ -23,11 +23,11 @@
 
 Signed-off-by: Joel Stanley <joel@jms.id.au>
 ---
- arch/powerpc/configs/skiroot_defconfig | 84 ++++++++++++++++----------
- 1 file changed, 53 insertions(+), 31 deletions(-)
+ arch/powerpc/configs/skiroot_defconfig | 83 ++++++++++++++++----------
+ 1 file changed, 53 insertions(+), 30 deletions(-)
 
 diff --git a/arch/powerpc/configs/skiroot_defconfig b/arch/powerpc/configs/skiroot_defconfig
-index 1253482a67c0..44309e12d84a 100644
+index 2e25b264f70f..44309e12d84a 100644
 --- a/arch/powerpc/configs/skiroot_defconfig
 +++ b/arch/powerpc/configs/skiroot_defconfig
 @@ -1,13 +1,9 @@
@@ -111,15 +111,7 @@
  CONFIG_DNS_RESOLVER=y
  # CONFIG_WIRELESS is not set
  CONFIG_DEVTMPFS=y
-@@ -83,7 +85,6 @@ CONFIG_EEPROM_AT24=m
- # CONFIG_OCXL is not set
- CONFIG_BLK_DEV_SD=m
- CONFIG_BLK_DEV_SR=m
--CONFIG_BLK_DEV_SR_VENDOR=y
- CONFIG_CHR_DEV_SG=m
- CONFIG_SCSI_CONSTANTS=y
- CONFIG_SCSI_SCAN_ASYNC=y
-@@ -140,7 +141,6 @@ CONFIG_TIGON3=m
+@@ -139,7 +141,6 @@ CONFIG_TIGON3=m
  CONFIG_BNX2X=m
  # CONFIG_NET_VENDOR_BROCADE is not set
  # CONFIG_NET_VENDOR_CADENCE is not set
@@ -127,7 +119,7 @@
  # CONFIG_NET_VENDOR_CAVIUM is not set
  CONFIG_CHELSIO_T1=m
  # CONFIG_NET_VENDOR_CISCO is not set
-@@ -149,7 +149,6 @@ CONFIG_CHELSIO_T1=m
+@@ -148,7 +149,6 @@ CONFIG_CHELSIO_T1=m
  # CONFIG_NET_VENDOR_DLINK is not set
  CONFIG_BE2NET=m
  # CONFIG_NET_VENDOR_EZCHIP is not set
@@ -135,7 +127,7 @@
  # CONFIG_NET_VENDOR_HUAWEI is not set
  CONFIG_E1000=m
  CONFIG_E1000E=m
-@@ -157,7 +156,6 @@ CONFIG_IGB=m
+@@ -156,7 +156,6 @@ CONFIG_IGB=m
  CONFIG_IXGB=m
  CONFIG_IXGBE=m
  CONFIG_I40E=m
@@ -143,7 +135,7 @@
  # CONFIG_NET_VENDOR_MARVELL is not set
  CONFIG_MLX4_EN=m
  # CONFIG_MLX4_CORE_GEN2 is not set
-@@ -168,12 +166,12 @@ CONFIG_MLX5_CORE_EN=y
+@@ -167,12 +166,12 @@ CONFIG_MLX5_CORE_EN=y
  # CONFIG_NET_VENDOR_MICROSEMI is not set
  CONFIG_MYRI10GE=m
  # CONFIG_NET_VENDOR_NATSEMI is not set
@@ -157,7 +149,7 @@
  CONFIG_NETXEN_NIC=m
  CONFIG_QED=m
  CONFIG_QEDE=m
-@@ -211,7 +209,6 @@ CONFIG_IPMI_DEVICE_INTERFACE=y
+@@ -210,7 +209,6 @@ CONFIG_IPMI_DEVICE_INTERFACE=y
  CONFIG_IPMI_POWERNV=y
  CONFIG_IPMI_WATCHDOG=y
  CONFIG_HW_RANDOM=y
@@ -165,7 +157,7 @@
  CONFIG_TCG_TIS_I2C_NUVOTON=y
  # CONFIG_DEVPORT is not set
  CONFIG_I2C=y
-@@ -240,7 +237,6 @@ CONFIG_HID_CYPRESS=y
+@@ -239,7 +237,6 @@ CONFIG_HID_CYPRESS=y
  CONFIG_HID_EZKEY=y
  CONFIG_HID_ITE=y
  CONFIG_HID_KENSINGTON=y
@@ -173,7 +165,7 @@
  CONFIG_HID_MICROSOFT=y
  CONFIG_HID_MONTEREY=y
  CONFIG_USB_HIDDEV=y
-@@ -277,6 +273,29 @@ CONFIG_NLS_CODEPAGE_437=y
+@@ -276,6 +273,29 @@ CONFIG_NLS_CODEPAGE_437=y
  CONFIG_NLS_ASCII=y
  CONFIG_NLS_ISO8859_1=y
  CONFIG_NLS_UTF8=y
@@ -203,7 +195,7 @@
  CONFIG_CRC16=y
  CONFIG_CRC_ITU_T=y
  CONFIG_LIBCRC32C=y
-@@ -287,17 +306,20 @@ CONFIG_LIBCRC32C=y
+@@ -286,17 +306,20 @@ CONFIG_LIBCRC32C=y
  # CONFIG_XZ_DEC_SPARC is not set
  CONFIG_PRINTK_TIME=y
  CONFIG_MAGIC_SYSRQ=y