Add witherspoon defconfig, p9 support for hostboot

Opened RTC issues 160270 and 160273 to fix patches that were
added.
diff --git a/openpower/package/capp-ucode/Config.in b/openpower/package/capp-ucode/Config.in
index 1bdbc23..d432419 100644
--- a/openpower/package/capp-ucode/Config.in
+++ b/openpower/package/capp-ucode/Config.in
@@ -1,6 +1,6 @@
 config BR2_PACKAGE_CAPP_UCODE
         bool "capp_capp"
-        default y if (BR2_OPENPOWER_PLATFORM && BR2_powerpc_power8)
+        default y if (BR2_OPENPOWER_PLATFORM)
         help
             Microcode for CAPP hardware