msm_fb: display: HDMI power reduction at suspend

During suspend, HDMI clocks are still running and power
consumption is high. Usually HPD module is kept on even
when the cable is not connected to sense the cable
re-connect. But cable connect sense is not required when
the device is suspended. This change makes sure that HPD,
along with other HDMI modules, are totally shutdown during
suspend and there is no power consumption by HDMI.

CRs-fixed: 335821
Change-Id: I90c6ec6ca99a9396609028fda9f1768324e7d3da
Signed-off-by: Ajay Singh Parmar <aparmar@codeaurora.org>