glamor: fix CbCr format handling
CbCr format in core Glamor does not have a PIXMAN format associate. Fix this. Also added more generic check for texture_rg (because it has 2 different names), and added check for texture_rg on ES renderer.
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CbCr format in core Glamor does not have a PIXMAN format associate. Fix this. Also added more generic check for texture_rg (because it has 2 different names), and added check for texture_rg on ES renderer.