OPP: switch to use kmemdup_array()

Use kmemdup_array() to avoid multiplication and possible overflows.

Signed-off-by: Zhang Enpei <[e-mail]>
Signed-off-by: Viresh Kumar <[e-mail]>

drivers/opp/core.c

···
 	if (opp_table->supported_hw)
 		return 0;
 
-	opp_table->supported_hw = kmemdup(versions, count * sizeof(*versions),
-					GFP_KERNEL);
+	opp_table->supported_hw = kmemdup_array(versions, count,
+						sizeof(*versions), GFP_KERNEL);
 	if (!opp_table->supported_hw)
 		return -ENOMEM;