shader: Make surface_component_bits conditional on logicops

This shader key field is only used if logic ops are enabled, so we can
gain a little bit of performance by avoid unnecessary recompilation
here.

Signed-off-by: Italo Nicola <italonicola@collabora.com>
Reviewed-by: Gert Wollny <gert.wollny@collabora.com>

src/vrend_renderer.c

@@ -3557,9 +3557,12 @@ static inline void vrend_fill_shader_key(struct vrend_sub_context *sub_ctx,
                                  key->fs.cbufs_signed_int_bitmask,
                                  key->fs.cbufs_unsigned_int_bitmask);
             }
+            /* Currently we only use this information if logicop_enable is set */
+            if (sub_ctx->blend_state.logicop_enable) {
                 key->fs.surface_component_bits[i] = util_format_get_component_bits(sub_ctx->surf[i]->format, UTIL_FORMAT_COLORSPACE_RGB, 0);
             }
          }
+      }
 
       key->pstipple_tex = sub_ctx->rs_state.poly_stipple_enable;
       key->color_two_side = sub_ctx->rs_state.light_twoside;