ARM: dts: msm: fix ssd2080m pixel corruption issue

There's pixel corruption issue on the right corner of
ssd2080m with current panel setting, vendor suggests to
update porch and gate setting to address this issue.

CRs-fixed: 591272
Change-Id: Ibff3312b4dd89867ca2b4b882d62315b39dd4ec7
Signed-off-by: Ray Zhang <rayz@codeaurora.org>