msm_fb: cleanup lg comments

Change-Id: I0be65bae79fb507e3c92d70daf488f6ce3e4aec9
msm_fb: Fix chroma offset calculation for YUV as source format

For frame composition using MDP, fix the calculation of source
chroma offset pointer to be programmed to MDP hardware whenever
the crop 'y' value is non-zero. This prevents green lines/chroma
shift and other artifacts from being seen on the panel.

CRs-fixed: 438027
Change-Id: Id6c2a7d2c2709edd0bacfc049df360e1c0f3b90f
Signed-off-by: Padmanabhan Komanduru <pkomandu@codeaurora.org>
msm_fb: Create sysfs nodes during frame buffer initialization

During boot up, create two sysfs nodes and write the xres and
yres details of the panel used. This is required to support
dynamic DPI value setting based on panel resolution.

CRs-fixed: 443699
Change-Id: I5b85c95653e6cb7aba2aea103c23b587ac01795e
Signed-off-by: Padmanabhan Komanduru <pkomandu@codeaurora.org>