msm: hdmi: edid: fix parsing of 4K resolution from DTD

Detailed Timing Descriptors (DTDs) listed in the EDID data contain
the information about the horizontal addressable video pixels for
each resolution. The maximum value that can be specified for this
field is 4095. In certain instances, a sink may list a resolution
with 4096 horizontal addressable video pixels in the DTD by listing
a value of 4095. If this value is parsed as is, it can lead to
incorrect behavior. Fix this by explicitly updating the value to
4096.

CRs-Fixed: 2020154
Change-Id: I035bbef7d245c7cdd75a5bba8719fcca4592d8b7
Signed-off-by: Aravind Venkateswaran <aravindh@codeaurora.org>