staging: most: Delete an unnecessary check before the function call "module_put"

The module_put() function tests whether its argument is NULL and then
returns immediately. Thus the test around the call is not needed.

This issue was detected by using the Coccinelle software.

Signed-off-by: Markus Elfring <[e-mail]>
Signed-off-by: Greg Kroah-Hartman <[e-mail]>

drivers/staging/most/mostcore/core.c

···
 	return 0;
 
 error:
-	if (iface->mod)
-		module_put(iface->mod);
+	module_put(iface->mod);
 	modref--;
 	mutex_unlock(&c->start_mutex);
 	return ret;