nfp: flower: Fix a potential leak in nfptunneladdsharedmac()
This is an automated ID intended to aid in discovery of potential security vulnerabilities. The actual impact and attack plausibility have not yet been proven. This ID is fixed in Linux Kernel version v5.4.182 by commit 5ad5886f85b6bd893e3ed19013765fb0c243c069, it was introduced in version v5.1 by commit 20cce88650981ec504d328dbbdd004d991eb8535. For more details please see the references link.