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 <[e-mail]>
Signed-off-by: Yang Li <[e-mail]>
Signed-off-by: Chanwoo Choi <[e-mail]>

drivers/devfreq/rk3399_dmc.c

···
 	default:
 		ret = -EINVAL;
 		goto err_edev;
-	};
+	}
 
 no_pmu:
 	arm_smccc_smc(ROCKCHIP_SIP_DRAM_FREQ, 0, 0,