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/configs/openpower_mambo_defconfig b/openpower/configs/openpower_mambo_defconfig
index 3494c38..9568777 100644
--- a/openpower/configs/openpower_mambo_defconfig
+++ b/openpower/configs/openpower_mambo_defconfig
@@ -36,13 +36,12 @@
 BR2_OPENPOWER_PLATFORM=y
 BR2_OPENPOWER_POWER8=y
 # BR2_PACKAGE_HOST_OPENPOWER_FFS is not set
-# BR2_PACKAGE_HOSTBOOT is not set
+# BR2_PACKAGE_HOSTBOOT_P8 is not set
 # BR2_PACKAGE_HOSTBOOT_BINARIES is not set
 # BR2_PACKAGE_MACHINE_XML is not set
 # BR2_PACKAGE_OPENPOWER_PNOR is not set
 BR2_OPENPOWER_CONFIG_NAME="openpower-mambo"
 BR2_PACKAGE_PETITBOOT=y
 # BR2_PACKAGE_HOST_P8_PORE_BINUTILS is not set
-# BR2_PACKAGE_OCC is not set
 # BR2_PACKAGE_CAPP_UCODE is not set
 # BR2_PACKAGE_IMA_CATALOG is not set