PM / devfreq: rk3399_dmc: Remove unneeded semicolon

Eliminate the following coccicheck warning:
./drivers/devfreq/rk3399_dmc.c:403:2-3: Unneeded semicolon
Reported-by: Abaci Robot <abaci@linux.alibaba.com>
Signed-off-by: Yang Li <yang.lee@linux.alibaba.com>
Signed-off-by: Chanwoo Choi <cw00.choi@samsung.com>

drivers/devfreq/rk3399_dmc.c

@@ -400,7 +400,7 @@ static int rk3399_dmcfreq_probe(struct platform_device *pdev)
 	default:
 		ret = -EINVAL;
 		goto err_edev;
-	};
+	}
 
 no_pmu:
 	arm_smccc_smc(ROCKCHIP_SIP_DRAM_FREQ, 0, 0,