gen8/state: Remove SKL special-casing for MinimumArrayElement
gen8/state: Remove SKL special-casing for MinimumArrayElement

MinimumArrayElement carries the same meaning for BDW and SKL.
Suggested by Jason.

No regressions in dEQP-VK.pipeline.image.view_type.cube_array.*
Fixes a number of cube tests, including cube_array_base_slice
and cube_base_slice tests.

metora/MesaGLSLCompiler,metora/MesaGLSLCompiler,metora/MesaGLSLCompiler