net: dsa: rtl8366rb: remove unneeded semicolon

Eliminate the following coccicheck warning:
./drivers/net/dsa/rtl8366rb.c:1348:2-3: Unneeded semicolon
Reported-by: Abaci Robot <abaci@linux.alibaba.com>
Signed-off-by: Yang Li <yang.lee@linux.alibaba.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/dsa/rtl8366rb.c

@@ -1345,7 +1345,7 @@ rtl8366rb_port_stp_state_set(struct dsa_switch *ds, int port, u8 state)
 	default:
 		dev_err(smi->dev, "unknown bridge state requested\n");
 		return;
-	};
+	}
 
 	/* Set the same status for the port on all the FIDs */
 	for (i = 0; i < RTL8366RB_NUM_FIDS; i++) {