msm: mdss: hdmi: fix HDMI panel reconfiguration issue

New video timing's VIC value is compared against previously
configured HDMI controller's VIC value. If both the VICs are same
(though their video timing parameters are different), MDSS skips
reconfiguration. Reset HDMI controller's VIC value for every
cable connection so that MDSS can reconfigure the panel with
new video timing.

Change-Id: I3d26669f8853c4b84e5be2c4a26931f299daa8c5
Signed-off-by: Narender Ankam <nankam@codeaurora.org>