isl: Don't align phys_slice0_sa.width twice
isl: Don't align phys_slice0_sa.width twice

It's already aligned to the format's block width. Don't align it again
in isl_calc_row_pitch().

metora/MesaGLSLCompiler,metora/MesaGLSLCompiler,metora/MesaGLSLCompiler