drm/amdgpu: fix semicolon.cocci warnings

drivers/gpu/drm/amd/amdgpu/amdgpu_psp.c:133:2-3: Unneeded semicolon

 Remove unneeded semicolon.

Generated by: scripts/coccinelle/misc/semicolon.cocci
Acked-by: NHuang Rui <ray.huang@amd.com>
CC: Huang Rui <ray.huang@amd.com>
Signed-off-by: NFengguang Wu <fengguang.wu@intel.com>
Signed-off-by: NAlex Deucher <alexander.deucher@amd.com>

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

@@ -130,7 +130,7 @@ psp_cmd_submit_buf(struct psp_context *psp,
 
 	while (*((unsigned int *)psp->fence_buf) != index) {
 		msleep(1);
-	};
+	}
 
 	amdgpu_bo_free_kernel(&cmd_buf_bo,
 			      &cmd_buf_mc_addr,