msm: mdss: set default resolution of DBA driver during boot

In cases of EDID read or parser failures, driver should expose
a default resolution to other modules to continue with the HDMI
initialization. So during bridge chip initialization sequence
update the default resolution.

Change-Id: Ia6a7f8b4d9e3f1650b9c11aafc118a2662801ba0
Signed-off-by: Sandeep Panda <spanda@codeaurora.org>