msm: mdss: hdmi: optimize DTD resolution parsing

DTD (Detailed Timing Descriptor) provides full resolution timing
details. Currently we compare these details with our resolution
data base to find a match. This is not needed as DTD has complete
details. Once parsing of resolution is done, just add this as a
new resolution.

Change-Id: I0d6c101c96a6bc8c0ff8fe63c17bf233d52dad7f
Signed-off-by: Ajay Singh Parmar <aparmar@codeaurora.org>