This patch adds basic A4LC pm domain support.
Now, below devices can be controled by PM

MERAM, LCDC, VOU, ICBS, SDENC-Link
Signed-off-by: NKuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Acked-by: NMagnus Damm <damm@opensource.se>
Signed-off-by: NRafael J. Wysocki <rjw@sisk.pl>