lavapipe: fix implicit-fallthrough warning

Fixes a warning on clang

Reviewed-by: Emma Anholt <emma@anholt.net>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/14252>

src/gallium/frontends/lavapipe/lvp_descriptor_set.c

@@ -449,6 +449,7 @@ VKAPI_ATTR void VKAPI_CALL lvp_UpdateDescriptorSets(
             };
 
          }
+         break;
 
       default:
          break;

src/gallium/frontends/lavapipe/lvp_device.c

@@ -1968,6 +1968,7 @@ VKAPI_ATTR VkResult VKAPI_CALL lvp_BindImageMemory2(VkDevice _device,
                                                    image->pmem,
                                                    image->memory_offset);
             did_bind = true;
+            break;
          }
          default:
             break;