[ARM] 4468/2: ANUBIS: Add SM501 device resources

Add resources for the SM501 present on the
Simtec Anubis board, including the framebuffer
and the I2C for DDC.

Signed-off-by: Ben Dooks <ben-linux@fluff.org>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>