qcacld-3.0: Fix incorrect error handling in hdd_module_init()

The function wlan_init_sysfs() returns 0 on success; and
errno on failure. Fix this error handling to check for ret instead of !ret.

Change-Id: I9acc30985735b014464b83c9e3dffea2d1cb4226
CRs-Fixed: 1085184

core/hdd/src/wlan_hdd_main.c

@@ -9230,7 +9230,7 @@ static ssize_t wlan_boot_cb(struct kobject *kobj,
  * This is creates the syfs entry boot_wlan. Which shall be invoked
  * when the filesystem is ready.
  *
- * Return: None
+ * Return: 0 for success, errno on failure
  */
 static int wlan_init_sysfs(void)
 {
@@ -9335,7 +9335,7 @@ static int __init hdd_module_init(void)
 	int ret = -EINVAL;
 
 	ret = wlan_init_sysfs();
-	if (!ret)
+	if (ret)
 		pr_err("Failed to create sysfs entry for loading wlan");
 
 	return ret;