ARM: shmobile: sh73a0: Add pin control resources

Add memory resources for the pin control platform device to let the
sh-pfc driver ioremap() registers properly instead of evily casting
register physical addresses to virtual addresses.

Signed-off-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>
Acked-by: Paul Mundt <lethal@linux-sh.org>
Acked-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Simon Horman <horms+renesas@verge.net.au>