virtio-gpu: Remove superfluous memory_region_set_enabled()

There is no need to explicitly enable/disable memory region when it's
added or deleted respectively. Remove superfluous set_enabled() calls
for consistency.

Suggested-by: Akihiko Odaki <odaki@rsg.ci.i.u-tokyo.ac.jp>
Reviewed-by: Akihiko Odaki <odaki@rsg.ci.i.u-tokyo.ac.jp>
Reviewed-by: Alex Bennée <alex.bennee@linaro.org>
Signed-off-by: Dmitry Osipenko <dmitry.osipenko@collabora.com>
Message-ID: <20260303151422.977399-15-dmitry.osipenko@collabora.com>
Message-ID: <20260304165043.1437519-17-alex.bennee@linaro.org>
Signed-off-by: Alex Bennée <alex.bennee@linaro.org>

hw/display/virtio-gpu-virgl.c

@@ -171,7 +171,6 @@ virtio_gpu_virgl_map_resource_blob(VirtIOGPU *g,
     mr = &vmr->mr;
     memory_region_init_ram_ptr(mr, OBJECT(vmr), "mr", size, data);
     memory_region_add_subregion(&b->hostmem, offset, mr);
-    memory_region_set_enabled(mr, true);
 
     res->mr = mr;
 
@@ -225,7 +224,6 @@ virtio_gpu_virgl_unmap_resource_blob(VirtIOGPU *g,
         b->renderer_blocked++;
 
         /* memory region owns self res->mr object and frees it by itself */
-        memory_region_set_enabled(mr, false);
         memory_region_del_subregion(&b->hostmem, mr);
         object_unparent(OBJECT(vmr));
     }