Add profile and userspace for P2812HNUF1/3, switch from UBI_GLUEBI to UBI_BLOCK

Signed-off-by: Sylwester Petela <sscapi@gmail.com>

git-svn-id: svn://svn.openwrt.org/openwrt/trunk@43987 3c298f89-4303-0410-b956-a3cf2f4a3e73