drm/bridge: lt9611uxc: Add video config for lt9611uxc

Add lanes number and infterface number config for lt9611uxc,
and add the code to control lt9611 power enable/disable using gpio.

Change-Id: I18e12791ac671ba1d14f0815a94068fd5ae1abf2
Signed-off-by: Wenjun Zhang <wjzhan@codeaurora.org>