Add device tree for P2812HNUF1 and P2812HNUF3. Signed-off-by: Sylwester Petela <sscapi@gmail.com> git-svn-id: svn://svn.openwrt.org/openwrt/trunk@43986 3c298f89-4303-0410-b956-a3cf2f4a3e73