kernel: Move to Linux v5.4.13-openpower1

PowerPC releated changes:

 powerpc/powernv: Disable native PCIe port management
 powerpc/spinlocks: Include correct header for static key
 powerpc/vcpu: Assume dedicated processors as non-preempt
 powerpc: Ensure that swiotlb buffer is allocated from low memory
 powerpc/pmem: Fix kernel crash due to wrong range value usage in flush_dcache_range
 powerpc/mm: Mark get_slice_psize() & slice_addr_is_low() as notrace
 powerpc: Chunk calls to flush_dcache_range in arch_*_memory
 mm/memory_hotplug: shrink zones when offlining memory
 powerpc: Fix __clear_user() with KUAP enabled
 Revert "powerpc/vcpu: Assume dedicated processors as non-preempt"
 libfdt: define INT32_MAX and UINT32_MAX in libfdt_env.h
 powerpc: Don't add -mabi= flags when building with Clang
 powerpc/fixmap: Use __fix_to_virt() instead of fix_to_virt()
 powerpc/book3s/mm: Update Oops message to print the correct translation in use
 powerpc/eeh: differentiate duplicate detection message
 powerpc/security: Fix wrong message when RFI Flush is disable
 powerpc/pseries/cmm: Implement release() function for sysfs device
 powerpc/book3s64/hash: Add cond_resched to avoid soft lockup warning
 powerpc/security/book3s64: Report L1TF status in sysfs
 powerpc/tools: Don't quote $objdump in scripts
 powerpc/pseries: Don't fail hash page table insert for bolted mapping
 powerpc/pseries: Mark accumulate_stolen_time() as notrace
 powerpc/papr_scm: Fix an off-by-one check in papr_scm_meta_{get, set}

Signed-off-by: Joel Stanley <joel@jms.id.au>
diff --git a/openpower/configs/opal_defconfig b/openpower/configs/opal_defconfig
index 43bceb5..9ec900f 100644
--- a/openpower/configs/opal_defconfig
+++ b/openpower/configs/opal_defconfig
@@ -12,7 +12,7 @@
 BR2_ROOTFS_POST_BUILD_SCRIPT="../openpower/scripts/fixup-target-var ../openpower/scripts/firmware-whitelist"
 BR2_LINUX_KERNEL=y
 BR2_LINUX_KERNEL_CUSTOM_VERSION=y
-BR2_LINUX_KERNEL_CUSTOM_VERSION_VALUE="5.4.7"
+BR2_LINUX_KERNEL_CUSTOM_VERSION_VALUE="5.4.13"
 BR2_LINUX_KERNEL_PATCH="$(BR2_EXTERNAL_OP_BUILD_PATH)/linux"
 BR2_LINUX_KERNEL_USE_CUSTOM_CONFIG=y
 BR2_LINUX_KERNEL_CUSTOM_CONFIG_FILE="$(BR2_EXTERNAL_OP_BUILD_PATH)/configs/linux/skiroot_defconfig"