sh: add LCDC interrupt configuration to AP325 and Migo-R

Add LCDC interrupt resources for AP325 and Migo-R. The LCDC driver does
not require interrupts at this point, but changes such as one-shot SYS
mode using deferred io, and wait-for-vblank will both need this.

Signed-off-by: Magnus Damm <damm@igel.co.jp>
Signed-off-by: Paul Mundt <lethal@linux-sh.org>