drm/msm/dp: avoid duplicate segment/EDID address AUX transactions

The DRM upstream driver triggers sending the EDID address to the sink
at the beginning of every EDID block. After commit '729c0029'
("drm/msm/dp: avoid sending segment_address command for segment-0"),
we don't send the segment address for segment-0 and this causes sending
duplicate EDID address for block-0 and block-1 without segment-0 address
in between them. This causes EDID read failures on some TVs. Avoid
sending duplicate segment/EDID address at the beginning of each block
since the DRM upstream driver triggers the AUX transaction for that.

Change-Id: Ic731de34584850f23d74e15897bb7b174b80e5b3
Signed-off-by: Padmanabhan Komanduru <pkomandu@codeaurora.org>