powerpc: disable CHRP and PMAC support in various defconfigs

Because CHRP and PMAC are by default enabled, several non-CHRP and non-PMAC
PowerPC defconfigs will have these Kconfig options set erroneously.

Signed-off-by: Timur Tabi <timur@freescale.com>
Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
diff --git a/arch/powerpc/configs/86xx/gef_sbc610_defconfig b/arch/powerpc/configs/86xx/gef_sbc610_defconfig
index f589489..312d7af 100644
--- a/arch/powerpc/configs/86xx/gef_sbc610_defconfig
+++ b/arch/powerpc/configs/86xx/gef_sbc610_defconfig
@@ -156,7 +156,10 @@
 #
 # Platform support
 #
-# CONFIG_PPC_MULTIPLATFORM is not set
+CONFIG_PPC_MULTIPLATFORM=y
+CONFIG_CLASSIC32=y
+# CONFIG_PPC_CHRP is not set
+# CONFIG_PPC_PMAC is not set
 # CONFIG_PPC_82xx is not set
 # CONFIG_PPC_83xx is not set
 CONFIG_PPC_86xx=y