msm: mdss: Share minimum width and height limitations on panel ROI

Add panel ROI limitations on minimum width and height values
to the panel info sys_fs node.

Change-Id: I3297beb20e7f207a296e6cec114daf2305324898
Signed-off-by: Jeykumar Sankaran <jsanka@codeaurora.org>
msm: mdss: Consider FLIP flags while optimizing pixel fetch

While calculating source and destination rect of a pipe for the
programmed ROI, consider FLIP flags set for the pipe.

Change-Id: I631453c26f443b08a23556f83195d9914e05b41d
Signed-off-by: Jeykumar Sankaran <jsanka@codeaurora.org>