net: marvell: prestera: Add missing of_node_put() in prestera_switch_set_base_mac_addr
In the Linux kernel, the following vulnerability has been resolved:

net: marvell: prestera: Add missing of_node_put() in prestera_switch_set_base_mac_addr

This node pointer is returned by of_find_compatible_node() with
refcount incremented. Calling of_node_put() to aovid the refcount leak.