msm: mdss: hdmi: use proper timeout values while reading rxstatus

Calculate timeout values in terms of hsync with respect to resolution
timing. For a given timeout value, calculate number of lines that will
take that much of time to be transmitted to sink. Use that value to
program the hardware for timeout.

Change-Id: I9606180d4c9b2d666dbac3d807f5bb61b84af68e
Signed-off-by: Ajay Singh Parmar <aparmar@codeaurora.org>