Merge branch 'master' into master-p10

Pull the upstream 'master' branch into master-p10. This is
a necessary step in allowing us to eventually merge back
the master-p10 branch upstream.

A few highlights in solving the conflicts:
 * buildroot is now the upstream openpower version (2020.08.2)
 * the openpower-pnor package is the upstream version (without
   Power10 support). This is due to us using openpower-pnor-p10
   for Power10 recently.

Signed-off-by: Klaus Heinrich Kiwi <klaus@linux.vnet.ibm.com>

Conflicts:
	.gitmodules
	README.md
	buildroot
	openpower/package/Config.in
	openpower/package/hostboot-binaries/Config.in
	openpower/package/ocmb-explorer-fw/Config.in
	openpower/package/ocmb-explorer-fw/ocmb-explorer-fw.mk
	openpower/package/openpower-pnor/Config.in
	openpower/package/openpower-pnor/openpower-pnor.mk
	openpower/package/ppe42-binutils/Config.in
	openpower/package/ppe42-gcc/Config.in
	openpower/package/skiboot/Config.in
	openpower/platform/Config.in
diff --git a/openpower/platform/Config.in b/openpower/platform/Config.in
index b6baa4d..efe480b 100644
--- a/openpower/platform/Config.in
+++ b/openpower/platform/Config.in
@@ -1,12 +1,7 @@
 config BR2_OPENPOWER_PLATFORM
     bool "Enables only one openPower platform"
     default n
-    depends on ((BR2_OPENPOWER_POWER8 || BR2_OPENPOWER_POWER9 || BR2_OPENPOWER_POWER10) && !(BR2_OPENPOWER_POWER8 && BR2_OPENPOWER_POWER9) && !(BR2_OPENPOWER_POWER8 && BR2_OPENPOWER_POWER10) && !(BR2_OPENPOWER_POWER9 && BR2_OPENPOWER_POWER10) && !(BR2_OPENPOWER_POWER8 && BR2_OPENPOWER_POWER9 && BR2_OPENPOWER_POWER10))
-
-config BR2_OPENPOWER_POWER8
-    bool "Enables the OpenPower p8 platform"
-    default n
-    depends on BR2_powerpc64 || BR2_powerpc64le
+    depends on ((BR2_OPENPOWER_POWER9 || BR2_OPENPOWER_POWER10) && !(BR2_OPENPOWER_POWER9 && BR2_OPENPOWER_POWER10))
 
 config BR2_OPENPOWER_POWER9
     bool "Enables the OpenPower p9 platform"