thermal: cpu_cooling: small memory leak on error

There was a left over return here so the error handling isn't run.
It leads to a small memory leak and a static checker warning.

	drivers/thermal/cpu_cooling.c:351 __cpufreq_cooling_register()
	info: ignoring unreachable code.

Fixes: f6859014c7e7 ("thermal: cpu_cooling: Store frequencies in descending order")
Acked-by: Viresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Eduardo Valentin <edubezval@gmail.com>

drivers/thermal/cpu_cooling.c

@@ -347,7 +347,6 @@ __cpufreq_cooling_register(struct device_node *np,
 	cpufreq_dev->freq_table = kmalloc(sizeof(*cpufreq_dev->freq_table) *
 					  cpufreq_dev->max_level, GFP_KERNEL);
 	if (!cpufreq_dev->freq_table) {
-		return ERR_PTR(-ENOMEM);
 		cool_dev = ERR_PTR(-ENOMEM);
 		goto free_cdev;
 	}