vrend: allocate texture, always use texture storage when available

For multisample textures glTexStorage*DMultisample was only used on GLES
and not when the GL host provided it. Texture views need the texture to be
immutable and this is achieved by allocating them using glTexStorage.

Signed-off-by: Gert Wollny <gert.wollny@collabora.com>
Reviewed-by: Dave Airlie <airlied@redhat.com>

src/vrend_renderer.c

@@ -4931,7 +4931,7 @@ static int vrend_renderer_resource_allocate_texture(struct vrend_resource *gr,
 	 return EINVAL;
       }
    } else if (pr->nr_samples > 1) {
-      if (vrend_state.use_gles) {
+      if (vrend_state.use_gles || vrend_state.have_texture_storage) {
          if (gr->target == GL_TEXTURE_2D_MULTISAMPLE) {
             glTexStorage2DMultisample(gr->target, pr->nr_samples,
                                       internalformat, pr->width0, pr->height0,