intel/compiler: Re-prefix non-logical surface opcodes with VEC4

The scalar back-end uses SHADER_OPCODE_SEND for all surface messages so
we no longer need the non-logical opcodes there.  Prefix them VEC4 so
it's clear that they're only used by the vec4 back-end.

Reviewed-by: Caio Marcelo de Oliveira Filho <caio.oliveira@intel.com>

src/intel/compiler/brw_fs_copy_propagation.cpp

@@ -709,18 +709,6 @@ fs_visitor::try_constant_propagate(fs_inst *inst, acp_entry *entry)
          }
          break;
 
-      case SHADER_OPCODE_UNTYPED_ATOMIC:
-      case SHADER_OPCODE_UNTYPED_SURFACE_READ:
-      case SHADER_OPCODE_UNTYPED_SURFACE_WRITE:
-         /* We only propagate into the surface argument of the
-          * instruction. Everything else goes through LOAD_PAYLOAD.
-          */
-         if (i == 1) {
-            inst->src[i] = val;
-            progress = true;
-         }
-         break;
-
       case FS_OPCODE_FB_WRITE_LOGICAL:
          /* The stencil and omask sources of FS_OPCODE_FB_WRITE_LOGICAL are
           * bit-cast using a strided region so they cannot be immediates.