media: omap3isp: add CSI1 support

CSI-2 PHY power management is only needed for major version 15 of the ISP.
Additionally, set the CCP2 PHY for previous ISP versions as well.

These changes are necessary for CCP2 support.

Signed-off-by: Pavel Machek <pavel@ucw.cz>
Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>