msm: camera: isp: Add support for 10 & 12 bit Y only formats

Raw format for mono sensors are to be supported using Y10 and Y12 V4L2
formats. Add the corresponding case for calculation of words per line,
plane info.

CRs-Fixed: 993405
Change-Id: Idbde696fba3636640f7f2af208d0e3b23cf2013a
Signed-off-by: Harsh Shah <harshs@codeaurora.org>