KeyStone NETCP: assign MAC address to ALE switch port 0

Signed-off-by: Aurelien Jacquiot <a-jacquiot@ti.com>
Signed-off-by: Pietro Lascari <plascari@skytechitalia.it>
KeyStone RIO: fix spinlock usage + cosmetic fixes

Signed-off-by: Aurelien Jacquiot <a-jacquiot@ti.com>