ARM: shmobile: armadillo800eva: Register pinctrl mappings for LCDC0

Replace the GPIO-based LCDC0 pinmux configuration by pinctrl mappings.

Signed-off-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>
Acked-by: Linus Walleij <linus.walleij@linaro.org>