Bluetooth: btrtl: Fix memory leak in rtlbt_parse_firmware_v2()

The memory allocated for ptr using kvmalloc() is not freed on the last
error path. Fix that by freeing it on that error path.

Fixes: 9a24ce5 ("Bluetooth: btrtl: Firmware format v2 support")
Signed-off-by: Abdun Nihaal <nihaal@cse.iitm.ac.in>
Signed-off-by: Luiz Augusto von Dentz <luiz.von.dentz@intel.com>

Author: Abdun Nihaal

drivers/bluetooth/btrtl.c

@@ -625,8 +625,10 @@ static int rtlbt_parse_firmware_v2(struct hci_dev *hdev,
 		len += entry->len;
 	}
 
-	if (!len)
+	if (!len) {
+		kvfree(ptr);
 		return -EPERM;
+	}
 
 	*_buf = ptr;
 	return len;