cpufreq: tegra194: Remove the unneeded result variable

Return the value returned by smp_call_function_single() directly instead
of storing it in another redundant variable.

Reported-by: Zeal Robot <zealci@zte.com.cn>
Signed-off-by: ye xingchen <ye.xingchen@zte.com.cn>
[ Viresh: Minor update to commit log ]
Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>

drivers/cpufreq/tegra194-cpufreq.c

@@ -314,11 +314,7 @@ static void tegra194_get_cpu_ndiv_sysreg(void *ndiv)
 
 static int tegra194_get_cpu_ndiv(u32 cpu, u32 cpuid, u32 clusterid, u64 *ndiv)
 {
-	int ret;
-
-	ret = smp_call_function_single(cpu, tegra194_get_cpu_ndiv_sysreg, &ndiv, true);
-
-	return ret;
+	return smp_call_function_single(cpu, tegra194_get_cpu_ndiv_sysreg, &ndiv, true);
 }
 
 static void tegra194_set_cpu_ndiv_sysreg(void *data)