powerpc/defconfigs: Reduce 64bit vmlinux by making acenic and cramfs modules

Machines with acenic adapters are rare these days, so we may as well make it
a module. Cramfs is also very rarely used so we can make it a module.

Together this saves 143kB on a 64bit compile:

   text	   data	    bss	    dec	    hex	filename
8247176	1729404	1221988	11198568	 aae068	vmlinux~
8134997	1727588	1188836	11051421	 a8a19d	vmlinux

Signed-off-by: Anton Blanchard <anton@samba.org>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
diff --git a/arch/powerpc/configs/ppc64_defconfig b/arch/powerpc/configs/ppc64_defconfig
index 2524018..34a6b12c 100644
--- a/arch/powerpc/configs/ppc64_defconfig
+++ b/arch/powerpc/configs/ppc64_defconfig
@@ -980,7 +980,7 @@
 # CONFIG_SC92031 is not set
 # CONFIG_ATL2 is not set
 CONFIG_NETDEV_1000=y
-CONFIG_ACENIC=y
+CONFIG_ACENIC=m
 CONFIG_ACENIC_OMIT_TIGON_I=y
 # CONFIG_DL2K is not set
 CONFIG_E1000=y
@@ -1863,7 +1863,7 @@
 # CONFIG_BEFS_FS is not set
 # CONFIG_BFS_FS is not set
 # CONFIG_EFS_FS is not set
-CONFIG_CRAMFS=y
+CONFIG_CRAMFS=m
 # CONFIG_VXFS_FS is not set
 # CONFIG_MINIX_FS is not set
 # CONFIG_OMFS_FS is not set