intel/compiler,crocus: decouple vulkan driver and compiler from gallium

I'd like to mention that swizzle is a shader concept https://www.khronos.org/opengl/wiki/Data_Type_(GLSL)#Swizzling, and indeed both glsl and vulkan have that concept. As intel is already have exactly same thing repeat prog_instruction.h, I prefer use intel's version in this MR even though I think they can be shared.

indeed compiler/glsl/* is already using defines of form SWIZZLE_* from prog_instruction.h, so I think SWIZZLE_* should belongs to either compiler/shader_enums.h or some header in compiler/glsl/(which I don't know what is proper)