Remove support for POWER8 targets

* Remove configurations and packages related to POWER8 machines
* Adjust documentation where relevant
* Move 'opal_defconfig' to use Power9

Signed-off-by: Nick Bofferding <bofferdn@us.ibm.com>
Signed-off-by: Klaus Heinrich Kiwi <klaus@linux.vnet.ibm.com>
diff --git a/openpower/package/openpower-pnor/Config.in b/openpower/package/openpower-pnor/Config.in
index 82280f5..6311b50 100644
--- a/openpower/package/openpower-pnor/Config.in
+++ b/openpower/package/openpower-pnor/Config.in
@@ -1,13 +1,11 @@
 config BR2_PACKAGE_OPENPOWER_PNOR
         bool "openpower_pnor"
         default y if (BR2_OPENPOWER_PLATFORM)
-        select BR2_PACKAGE_HOSTBOOT if !BR2_OPENPOWER_POWER8
-        select BR2_PACKAGE_HOSTBOOT_P8 if BR2_OPENPOWER_POWER8
+        select BR2_PACKAGE_HOSTBOOT
         select BR2_PACKAGE_HOSTBOOT_BINARIES
         select BR2_PACKAGE_SKIBOOT
         select BR2_PACKAGE_OPENPOWER_FFS
-        select BR2_PACKAGE_OCC if !BR2_OPENPOWER_POWER8
-        select BR2_PACKAGE_OCC_P8 if BR2_OPENPOWER_POWER8
+        select BR2_PACKAGE_OCC
         select BR2_PACKAGE_CAPP_UCODE
         select BR2_PACKAGE_IMA_CATALOG
         select BR2_PACKAGE_HOST_OPENPOWER_VPNOR
diff --git a/openpower/package/openpower-pnor/openpower-pnor.mk b/openpower/package/openpower-pnor/openpower-pnor.mk
index 098f02b..7efe895 100644
--- a/openpower/package/openpower-pnor/openpower-pnor.mk
+++ b/openpower/package/openpower-pnor/openpower-pnor.mk
@@ -48,8 +48,6 @@
 
 ifeq ($(BR2_OPENPOWER_POWER9),y)
     OPENPOWER_RELEASE=p9
-else
-    OPENPOWER_RELEASE=p8
 endif
 
 OPENPOWER_PNOR_INSTALL_IMAGES = YES
@@ -83,9 +81,7 @@
 
 # Subpackages we want to include in the version info (do not include openpower-pnor)
 OPENPOWER_VERSIONED_SUBPACKAGES = skiboot
-ifeq ($(BR2_PACKAGE_HOSTBOOT_P8),y)
-OPENPOWER_VERSIONED_SUBPACKAGES += hostboot-p8 occ-p8
-endif
+
 ifeq ($(BR2_PACKAGE_HOSTBOOT),y)
 OPENPOWER_VERSIONED_SUBPACKAGES += hostboot occ
 endif
@@ -100,9 +96,7 @@
     OPENPOWER_VERSIONED_SUBPACKAGES += sbe hcode
 endif
 
-ifeq ($(BR2_PACKAGE_OCC_P8),y)
-    OCC_BIN_FILENAME=$(BR2_OCC_P8_BIN_FILENAME)
-else
+ifeq ($(BR2_PACKAGE_OCC),y)
     OCC_BIN_FILENAME=$(BR2_OCC_BIN_FILENAME)
 endif