mdss: hdmi: Use common header for resolution modes

HDMI driver needs to support multiple resolution modes
based on the target and the capabilities of a connected
sink. The video timing information pertaining to these
resolution modes needs to be shared between the driver
as well as corresponding userspace components. To avoid
having multiple copies of the timing information, use a
common header file that lists all the details of supported
resolution modes.

Change-Id: Ib0275222bfae670cd2f1960dec671a3aa74aa2d5
Signed-off-by: Aravind Venkateswaran <aravindh@codeaurora.org>
Signed-off-by: Manoj Rao <manojraj@codeaurora.org>