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/palmetto_defconfig b/openpower/configs/palmetto_defconfig
index 9f89006..8b3a764 100644
--- a/openpower/configs/palmetto_defconfig
+++ b/openpower/configs/palmetto_defconfig
@@ -37,7 +37,7 @@
 BR2_TARGET_ROOTFS_INITRAMFS=y
 BR2_OPENPOWER_PLATFORM=y
 BR2_OPENPOWER_POWER8=y
-BR2_HOSTBOOT_CONFIG_FILE="palmetto.config"
+BR2_HOSTBOOT_P8_CONFIG_FILE="palmetto.config"
 BR2_OPENPOWER_MACHINE_XML_GITHUB_PROJECT_VALUE="palmetto-xml"
 BR2_OPENPOWER_MACHINE_XML_VERSION="c6f563966e9fadc4fb60194c064b2310c9b916b1"
 BR2_OPENPOWER_MACHINE_XML_FILENAME="palmetto.xml"
@@ -55,7 +55,6 @@
 BR2_OPENPOWER_TARGETING_ECC_FILENAME="PALMETTO_HB.targeting.bin.ecc"
 BR2_PACKAGE_PETITBOOT=y
 BR2_PACKAGE_PETITBOOT_MTD=y
-BR2_OCC_BIN_FILENAME="occ.bin"
 BR2_CAPP_UCODE_BIN_FILENAME="cappucode.bin"
 BR2_PACKAGE_LOADKEYS=y
 BR2_IMA_CATALOG_DTS="POWER8"