intel/compiler: stop looking at GL structure on gfx6 gs/xfb support.
This will allow moving way from the gl_program on gfx6, and is prep work for crocus which can't use a GL structure here.
iris/anv is only minor change.
This will allow moving way from the gl_program on gfx6, and is prep work for crocus which can't use a GL structure here.
iris/anv is only minor change.