msm: mdss: edid: parse dtd and proper fps and pclk check

Parse the Detailed Timing Descriptors of both EDID blocks for
resolutions. Check if the resolution is already added in local
data base. Also, add tolerance to fps and pclk variations for
a give resolution so that EDID parser can capture all the
resolutions correctly as published by the sink's EDID.

Change-Id: I113988eb21f82eef022723c421b1c1c9d4dead9f
Signed-off-by: Ajay Singh Parmar <aparmar@codeaurora.org>