ARM: davinci: defconfig: enable devtmpfs and devtmpfs automount

Since udev-176, udev no longer creates device nodes under /dev
and this has to be managed by the kernel devtmpfs filesystem.

This means that a kernel built with the current defconfigs
will not boot on a system with a recent udev.

Also, enable automatic mounting of /dev for filesystems which
don't manually mount it.

Signed-off-by: Sekhar Nori <nsekhar@ti.com>

arch/arm/configs/da8xx_omapl_defconfig

@@ -45,6 +45,8 @@ CONFIG_IP_PNP_DHCP=y
 # CONFIG_INET_LRO is not set
 CONFIG_NETFILTER=y
 CONFIG_UEVENT_HELPER_PATH="/sbin/hotplug"
+CONFIG_DEVTMPFS=y
+CONFIG_DEVTMPFS_MOUNT=y
 # CONFIG_FW_LOADER is not set
 CONFIG_BLK_DEV_LOOP=m
 CONFIG_BLK_DEV_RAM=y

arch/arm/configs/davinci_all_defconfig

@@ -42,6 +42,8 @@ CONFIG_IP_PNP_DHCP=y
 # CONFIG_INET_LRO is not set
 CONFIG_NETFILTER=y
 CONFIG_UEVENT_HELPER_PATH="/sbin/hotplug"
+CONFIG_DEVTMPFS=y
+CONFIG_DEVTMPFS_MOUNT=y
 # CONFIG_FW_LOADER is not set
 CONFIG_MTD=m
 CONFIG_MTD_PARTITIONS=y