zz: Don't build OCC

We were dragging in ppe42 toolchain, adding a total of ~900s
to build time.

Signed-off-by: Stewart Smith <stewart@linux.ibm.com>
diff --git a/openpower/configs/zz_defconfig b/openpower/configs/zz_defconfig
index 7577d00..11363bb 100644
--- a/openpower/configs/zz_defconfig
+++ b/openpower/configs/zz_defconfig
@@ -50,6 +50,7 @@
 BR2_PACKAGE_PETITBOOT=y
 BR2_PACKAGE_PETITBOOT_MTD=y
 # BR2_PACKAGE_HCODE is not set
+# BR2_PACKAGE_OCC is not set
 # BR2_PACKAGE_CAPP_UCODE is not set
 BR2_PACKAGE_LOADKEYS=y
 # BR2_PACKAGE_HOST_PPE42_BINUTILS is not set