kernel: Move to Linux v5.3.5-openpower1

This adds Firmware Assissted dump passthrough mode to the OpenPower
kernel. These patches were backported from 5.4, and the
CONFIG_PRESERVE_FA_DUMP was added.

PowerPC related changes:

 powerpc: dump kernel log before carrying out fadump or kdump
 powerpc/eeh: Clean up EEH PEs after recovery finishes
 powerpc/64s/exception: machine check use correct cfar for late handler
 powerpc/eeh: Clear stale EEH_DEV_NO_HANDLER flag
 powerpc/perf: fix imc allocation failure handling
 powerpc/64s/radix: Fix memory hotplug section page table creation
 powerpc/futex: Fix warning: 'oldval' may be used uninitialized in this function
 powerpc/ptdump: fix walk_pagetables() address mismatch
 powerpc/rtas: use device model APIs and serialization during LPM
 powerpc/xmon: Check for HV mode when dumping XIVE info from OPAL
 powerpc/powernv/ioda2: Allocate TCE table levels on demand for default DMA window
 powerpc/imc: Dont create debugfs files for cpu-less nodes
 powerpc/Makefile: Always pass --synthetic to nm if supported
 powerpc/xive: Fix bogus error code returned by OPAL

Signed-off-by: Joel Stanley <joel@jms.id.au>
diff --git a/openpower/configs/linux/skiroot_defconfig b/openpower/configs/linux/skiroot_defconfig
index 7c6c1a1..554158a 100644
--- a/openpower/configs/linux/skiroot_defconfig
+++ b/openpower/configs/linux/skiroot_defconfig
@@ -36,6 +36,7 @@
 CONFIG_CPU_IDLE=y
 CONFIG_HZ_100=y
 CONFIG_KEXEC=y
+CONFIG_PRESERVE_FA_DUMP=y
 CONFIG_IRQ_ALL_CPUS=y
 CONFIG_NUMA=y
 CONFIG_PPC_64K_PAGES=y