ralink: update DCS-930 dts

* read MAC address from factory partition
* remove port defines since there is only one port (most likely C/P error)

Signed-off-by: Luka Perkov <luka@openwrt.org>

git-svn-id: svn://svn.openwrt.org/openwrt/trunk@43231 3c298f89-4303-0410-b956-a3cf2f4a3e73
ralink: DCS-930: enable sound

Camera has microphone; in order to use it by default enable sound support.

Signed-off-by: Luka Perkov <luka@openwrt.org>

git-svn-id: svn://svn.openwrt.org/openwrt/trunk@43232 3c298f89-4303-0410-b956-a3cf2f4a3e73