ARM: mach-shmobile: clock-sh73a0: add DSIxPHY clock support

Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Signed-off-by: Paul Mundt <lethal@linux-sh.org>

Conflicts:
	arch/arm/mach-shmobile/clock-sh73a0.c