Staging: wilc1000: linux_wlan: Remove NULL check before kfree

kfree on NULL pointer is a no-op.

The semantic patch used -

// <smpl>
@@ expression E; @@
- if (E != NULL) { kfree(E); }
+ kfree(E);
@@ expression E; @@
- if (E != NULL) { kfree(E); E = NULL; }
+ kfree(E);
+ E = NULL;
// </smpl>smpl>

Signed-off-by: Shraddha Barke <shraddha.6596@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/wilc1000/linux_wlan.c

@@ -1887,10 +1887,8 @@ static void __exit exit_wilc_driver(void)
 	sdio_unregister_driver(&wilc_bus);
 #endif
 
-	if (g_linux_wlan != NULL) {
-		kfree(g_linux_wlan);
-		g_linux_wlan = NULL;
-	}
+	kfree(g_linux_wlan);
+	g_linux_wlan = NULL;
 	printk("Module_exit Done.\n");
 
 #if defined(WILC_DEBUGFS)