mdss: hdmi: Correct configuration for DDC ref timer

This change updates the (Display Data Channel) DDC reference
timer in mdss domain to the optimal value which is calculated
based on the correct HDMI application clock frequency.

Change-Id: I0b9f32f2fb0f16cf79bca86e270039c8cf90ed94
Signed-off-by: Aravind Venkateswaran <aravindh@codeaurora.org>