msm: mdss: hdmi: bounds check for ieee reg id field

Ensure data is only read from allowed region for
IEEE reg ID field in the EDID data. This prevents
illegal data access beyond the limits of this buffer.

Change-Id: Iee6f1a54be6f1c833da37687c0c8063e3c27f122
CRs-Fixed: 522147
Signed-off-by: Manoj Rao <manojraj@codeaurora.org>