Split P8 and P9 Hostboot and OCC packages

This was causing a couple of issues:
1) increased complexity in build files
2) It breaks the pkg-version patch detection/checksum
3) Failing to apply patches to would silently fail

The split makes this a bit easier and requires less custom code.

We keep the P9 hostboot/occ named hostboot/occ, so that day-to-day,
nobody notices a difference. The only difference you'll notice
is if doing POWER8 hostboot/occ development, as the package name
will be 'hostboot-p8' or 'occ-p8'.

Fixes: https://github.com/open-power/op-build/issues/876
Fixes: https://github.com/open-power/op-build/issues/1194
Signed-off-by: Stewart Smith <stewart@linux.vnet.ibm.com>
diff --git a/openpower/package/openpower-pnor/Config.in b/openpower/package/openpower-pnor/Config.in
index 1c43735..836ef77 100644
--- a/openpower/package/openpower-pnor/Config.in
+++ b/openpower/package/openpower-pnor/Config.in
@@ -1,11 +1,13 @@
 config BR2_PACKAGE_OPENPOWER_PNOR
         bool "openpower_pnor"
         default y if (BR2_OPENPOWER_PLATFORM)
-        select BR2_PACKAGE_HOSTBOOT
+        select BR2_PACKAGE_HOSTBOOT if !BR2_OPENPOWER_POWER8
+        select BR2_PACKAGE_HOSTBOOT_P8 if BR2_OPENPOWER_POWER8
         select BR2_PACKAGE_HOSTBOOT_BINARIES
         select BR2_PACKAGE_SKIBOOT
         select BR2_PACKAGE_OPENPOWER_FFS
-        select BR2_PACKAGE_OCC
+        select BR2_PACKAGE_OCC if !BR2_OPENPOWER_POWER8
+        select BR2_PACKAGE_OCC_P8 if BR2_OPENPOWER_POWER8
         select BR2_PACKAGE_CAPP_UCODE
         select BR2_PACKAGE_IMA_CATALOG
         select BR2_PACKAGE_HOST_OPENPOWER_VPNOR