kernel: Move to Linux v5.4.22-openpower1

PowerPC releated changes (since 5.4.16, as the bump to 5.4.18 omitted
any information):

 powerpc: Do not consider weak unresolved symbol relocations as bad
 powerpc/mm: Don't log user reads to 0xffffffff
 powerpc/papr_scm: Fix leaking 'bus_desc.provider_name' in some paths
 powerpc/ptdump: Only enable PPC_CHECK_WX with STRICT_KERNEL_RWX
 powerpc/ptdump: Fix W+X verification call in mark_rodata_ro()
 Revert "powerpc/pseries/iommu: Don't use dma_iommu_ops on secure guests"
 powerpc/kuap: Fix set direction in allow/prevent_user_access()
 mm/mmu_gather: invalidate TLB correctly on batch allocation failure and flush
 powerpc/futex: Fix incorrect user access blocking
 of: Add OF_DMA_DEFAULT_COHERENT & select it on powerpc
 powerpc/xmon: don't access ASDR in VMs
 powerpc/ptdump: Fix W+X verification
 powerpc/mmu_gather: enable RCU_TABLE_FREE even for !SMP case

Signed-off-by: Joel Stanley <joel@jms.id.au>
diff --git a/openpower/linux/0003-Release-OpenPower-kernel.patch b/openpower/linux/0003-Release-OpenPower-kernel.patch
index 1121b1a..47c7620 100644
--- a/openpower/linux/0003-Release-OpenPower-kernel.patch
+++ b/openpower/linux/0003-Release-OpenPower-kernel.patch
@@ -9,13 +9,13 @@
  1 file changed, 1 insertion(+), 1 deletion(-)
 
 diff --git a/Makefile b/Makefile
-index e16d2e58ed4b..cabff177cbb4 100644
+index 9428ec3b611a..9cef4df5e554 100644
 --- a/Makefile
 +++ b/Makefile
 @@ -2,7 +2,7 @@
  VERSION = 5
  PATCHLEVEL = 4
- SUBLEVEL = 18
+ SUBLEVEL = 22
 -EXTRAVERSION =
 +EXTRAVERSION = -openpower1
  NAME = Kleptomaniac Octopus