cpufreq: imx6q: remove unused code

In voltage scale down path, the return value is NOT
used at all, remove them to simplify the code.
Signed-off-by: Anson Huang <Anson.Huang@nxp.com>
Acked-by: Viresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>

drivers/cpufreq/imx6q-cpufreq.c

@@ -177,22 +177,16 @@ static int imx6q_set_target(struct cpufreq_policy *policy, unsigned int index)
 	/* scaling down?  scale voltage after frequency */
 	if (new_freq < old_freq) {
 		ret = regulator_set_voltage_tol(arm_reg, volt, 0);
-		if (ret) {
+		if (ret)
 			dev_warn(cpu_dev,
 				 "failed to scale vddarm down: %d\n", ret);
-			ret = 0;
-		}
 		ret = regulator_set_voltage_tol(soc_reg, imx6_soc_volt[index], 0);
-		if (ret) {
+		if (ret)
 			dev_warn(cpu_dev, "failed to scale vddsoc down: %d\n", ret);
-			ret = 0;
-		}
 		if (!IS_ERR(pu_reg)) {
 			ret = regulator_set_voltage_tol(pu_reg, imx6_soc_volt[index], 0);
-			if (ret) {
+			if (ret)
 				dev_warn(cpu_dev, "failed to scale vddpu down: %d\n", ret);
-				ret = 0;
-			}
 		}
 	}