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/mpc8272_ads_defconfig b/arch/powerpc/configs/mpc8272_ads_defconfig
index ddbca3e..ff6f7c4 100644
--- a/arch/powerpc/configs/mpc8272_ads_defconfig
+++ b/arch/powerpc/configs/mpc8272_ads_defconfig
@@ -151,6 +151,8 @@
 #
 CONFIG_PPC_MULTIPLATFORM=y
 CONFIG_CLASSIC32=y
+# CONFIG_PPC_CHRP is not set
+# CONFIG_PPC_PMAC is not set
 # CONFIG_MPC5121_ADS is not set
 # CONFIG_MPC5121_GENERIC is not set
 # CONFIG_PPC_MPC52xx is not set