kernel: Move to Linux v5.4.132-openpower1

PowerPC related fixes since 5.4.107:

 powerpc: Offline CPU in stop_this_cpu()
 powerpc/stacktrace: Fix spurious "stale" traces in raise_backtrace_ipi()
 powerpc/64s: Fix crashes when toggling entry flush barrier
 powerpc/64s: Fix crashes when toggling stf barrier
 powerpc/iommu: Annotate nested lock for lockdep
 powerpc/smp: Set numa node before updating mask
 powerpc/xive: Fix xmon command "dxi"
 powerpc/perf: Fix PMU constraint check for EBB events
 powerpc/64s: Fix pte update for kernel memory on radix
 powerpc: Fix HAVE_HARDLOCKUP_DETECTOR_ARCH build configuration
 powerpc/prom: Mark identical_pvr_fixup as __init
 powerpc/fadump: Mark fadump_calculate_reserve_size as __init
 powerpc: fix EDEADLOCK redefinition error in uapi/asm/errno.h
 powerpc/eeh: Fix EEH handling for hugepages in ioremap space.
 powerpc: Force inlining of cpu_has_feature() to avoid build failure

Additionally, two of the patches that were carried have been merged into
the upstream stable tree:

 x86/efi: move common keyring handler functions to new file
 certs: Add EFI_CERT_X509_GUID support for dbx entries

Signed-off-by: Joel Stanley <joel@jms.id.au>
diff --git a/openpower/linux/0002-powerpc-Detect-the-secure-boot-mode-of-the-system.patch b/openpower/linux/0002-powerpc-Detect-the-secure-boot-mode-of-the-system.patch
index b275c9c..86c59c0 100644
--- a/openpower/linux/0002-powerpc-Detect-the-secure-boot-mode-of-the-system.patch
+++ b/openpower/linux/0002-powerpc-Detect-the-secure-boot-mode-of-the-system.patch
@@ -1,7 +1,7 @@
 From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
 From: Nayna Jain <nayna@linux.ibm.com>
 Date: Tue, 5 Nov 2019 17:00:22 -0600
-Subject: [PATCH 02/19] powerpc: Detect the secure boot mode of the system
+Subject: [PATCH 02/17] powerpc: Detect the secure boot mode of the system
 
 This patch defines a function to detect the secure boot state of a
 PowerNV system.
@@ -26,7 +26,7 @@
  create mode 100644 arch/powerpc/kernel/secure_boot.c
 
 diff --git a/arch/powerpc/Kconfig b/arch/powerpc/Kconfig
-index c4cbb65e742f..1a2db06962c7 100644
+index 757175ccf53c..f57f563f4e45 100644
 --- a/arch/powerpc/Kconfig
 +++ b/arch/powerpc/Kconfig
 @@ -936,6 +936,16 @@ config PPC_MEM_KEYS