powerpc/ps3: Update defconfig for systemd

Signed-off-by: Geoff Levand <geoff@infradead.org>
diff --git a/arch/powerpc/configs/ps3_defconfig b/arch/powerpc/configs/ps3_defconfig
index 0d6eb38..816030f 100644
--- a/arch/powerpc/configs/ps3_defconfig
+++ b/arch/powerpc/configs/ps3_defconfig
@@ -6,6 +6,7 @@
 CONFIG_SYSVIPC=y
 CONFIG_POSIX_MQUEUE=y
 CONFIG_HIGH_RES_TIMERS=y
+CONFIG_CGROUPS=y
 CONFIG_BLK_DEV_INITRD=y
 CONFIG_RD_LZMA=y
 CONFIG_CC_OPTIMIZE_FOR_SIZE=y
@@ -66,6 +67,8 @@
 CONFIG_MAC80211_RC_PID=y
 # CONFIG_MAC80211_RC_MINSTREL is not set
 CONFIG_UEVENT_HELPER_PATH="/sbin/hotplug"
+CONFIG_DEVTMPFS=y
+CONFIG_DEVTMPFS_MOUNT=y
 # CONFIG_FIRMWARE_IN_KERNEL is not set
 CONFIG_BLK_DEV_LOOP=y
 CONFIG_BLK_DEV_RAM=y