PM / devfreq: tegra30: use min to simplify actmon_cpu_to_emc_rate

Use min() to improve the readability of actmon_cpu_to_emc_rate() and
remove any unnecessary curly braces.

Reviewed-by: Dmitry Osipenko <[e-mail]>
Signed-off-by: Thorsten Blum <[e-mail]>
Acked-by: Thierry Reding <[e-mail]>
Signed-off-by: Chanwoo Choi <[e-mail]>
Link: https://patchwork.kernel.org/project/linux-pm/patch/[e-mail]/

drivers/devfreq/tegra30-devfreq.c

···
 #include <linux/interrupt.h>
 #include <linux/io.h>
 #include <linux/irq.h>
+#include <linux/minmax.h>
 #include <linux/module.h>
 #include <linux/of.h>
 #include <linux/platform_device.h>
···
 	unsigned int i;
 	const struct tegra_actmon_emc_ratio *ratio = actmon_emc_ratios;
 
-	for (i = 0; i < ARRAY_SIZE(actmon_emc_ratios); i++, ratio++) {
-		if (cpu_freq >= ratio->cpu_freq) {
-			if (ratio->emc_freq >= tegra->max_freq)
-				return tegra->max_freq;
-			else
-				return ratio->emc_freq;
-		}
-	}
+	for (i = 0; i < ARRAY_SIZE(actmon_emc_ratios); i++, ratio++)
+		if (cpu_freq >= ratio->cpu_freq)
+			return min(ratio->emc_freq, tegra->max_freq);
 
 	return 0;
 }