[ARM] 4379/1: AT91: LCD support on SAM9261-EK and SAM9263-EK boards

Add board-specific setup for the LCD on the Atmel AT91SAM9261-EK and
AT91SAM9263-EK boards.

Signed-off-by: Nicolas Ferre <nicolas.ferre@rfo.atmel.com>
Signed-off-by: Andrew Victor <andrew@sanpeople.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>