kernel: Move to Linux v5.0.5-openpower1

PowerPC changes:

 powerpc/security: Fix spectre_v2 reporting
 powerpc/vdso64: Fix CLOCK_MONOTONIC inconsistencies across Y2038

Defconfigs are regenerated as we are back on the default kernel version,
so the configs do not need to set the kernel series for the headers
package.

Signed-off-by: Joel Stanley <joel@jms.id.au>
diff --git a/openpower/linux/0002-Release-OpenPower-kernel.patch b/openpower/linux/0002-Release-OpenPower-kernel.patch
index 9dab9b2..a3535e3 100644
--- a/openpower/linux/0002-Release-OpenPower-kernel.patch
+++ b/openpower/linux/0002-Release-OpenPower-kernel.patch
@@ -1,6 +1,6 @@
 From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
 From: Joel Stanley <joel@jms.id.au>
-Date: Wed, 27 Mar 2019 12:53:02 +1030
+Date: Wed, 3 Apr 2019 10:58:35 +1030
 Subject: [PATCH 2/2] Release OpenPower kernel
 
 Signed-off-by: Joel Stanley <joel@jms.id.au>
@@ -9,13 +9,13 @@
  1 file changed, 1 insertion(+), 1 deletion(-)
 
 diff --git a/Makefile b/Makefile
-index 06fda21614bc..8022d6a2faed 100644
+index 63152c5ca136..d5bfc0358601 100644
 --- a/Makefile
 +++ b/Makefile
 @@ -2,7 +2,7 @@
  VERSION = 5
  PATCHLEVEL = 0
- SUBLEVEL = 4
+ SUBLEVEL = 5
 -EXTRAVERSION =
 +EXTRAVERSION = -openpower1
  NAME = Shy Crocodile