drm: amdgpu: Remove unneeded semicolon in amdgpu_vm.c

Fix following coccicheck warning:
./drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c:1726:2-3: Unneeded semicolon
Reviewed-by: Christian König <christian.koenig@amd.com>
Signed-off-by: Wan Jiabing <wanjiabing@vivo.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c

@@ -1763,7 +1763,7 @@ int amdgpu_vm_bo_update_mapping(struct amdgpu_device *adev,
 
 		amdgpu_res_next(&cursor, num_entries * AMDGPU_GPU_PAGE_SIZE);
 		start = tmp;
-	};
+	}
 
 	r = vm->update_funcs->commit(&params, fence);