devfreq_cooling: return on allocation failure

If the allocation fails then we can't continue.

Fixes: a76caf55e5b3 ('thermal: Add devfreq cooling')
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Eduardo Valentin <edubezval@gmail.com>
(cherry picked from commit ce5ee1611284bef81d0308c6c2749902f55ed1d5)
Signed-off-by: Alex Shi <alex.shi@linaro.org>
diff --git a/drivers/thermal/devfreq_cooling.c b/drivers/thermal/devfreq_cooling.c
index d1b7c32..01f0015 100644
--- a/drivers/thermal/devfreq_cooling.c
+++ b/drivers/thermal/devfreq_cooling.c
@@ -397,7 +397,7 @@
 		power_table = kcalloc(num_opps, sizeof(*power_table),
 				      GFP_KERNEL);
 		if (!power_table)
-			ret = -ENOMEM;
+			return -ENOMEM;
 	}
 
 	freq_table = kcalloc(num_opps, sizeof(*freq_table),