kmssink: Add tile format support

Submitted by Nicolas Dufresne @ndufresne

Link to original bug (#768703)

Description

This is a bit tricky. Tiled format in DRM are set with two values. The first is the format family (like NV12), and then you add a modifier that specify the transformation. The main issue right now is that I don't see anything in DRM to probe the availability of each modifiers for each formats.