ARM: shmobile: koelsch: Enable DEVTMPFS_MOUNT in defconfig

Without this, a Debian jessie nfsroot hangs early in the boot process.
Signed-off-by: Geert Uytterhoeven <geert+renesas@linux-m68k.org>
[horms+renesas@verge.net.au: resolved trivial conflict]
Signed-off-by: Simon Horman <horms+renesas@verge.net.au>

arch/arm/configs/koelsch_defconfig

@@ -34,6 +34,8 @@ CONFIG_UNIX=y
 CONFIG_INET=y
 CONFIG_IP_PNP=y
 CONFIG_IP_PNP_DHCP=y
+CONFIG_DEVTMPFS=y
+CONFIG_DEVTMPFS_MOUNT=y
 CONFIG_UEVENT_HELPER_PATH="/sbin/hotplug"
 CONFIG_BLK_DEV_SD=y
 CONFIG_ATA=y