intel/fs: Move the scalar-region conversion to the generator.

Move the scalar-region conversion from the IR to the generator, so it
doesn't affect the Gen11 path. We need the non-scalar regioning
for a later lowering pass that we are adding.

v2: Better commit message (Matt)

Reviewed-by: Matt Turner <mattst88@gmail.com>

src/intel/compiler/brw_fs_nir.cpp

@@ -3612,8 +3612,8 @@ fs_visitor::nir_emit_fs_intrinsic(const fs_builder &bld,
 
       for (unsigned int i = 0; i < instr->num_components; i++) {
          fs_reg interp =
-            component(interp_reg(nir_intrinsic_base(instr),
-                                 nir_intrinsic_component(instr) + i), 0);
+            interp_reg(nir_intrinsic_base(instr),
+                       nir_intrinsic_component(instr) + i);
          interp.type = BRW_REGISTER_TYPE_F;
          dest.type = BRW_REGISTER_TYPE_F;