Determine if the given ethernet address is valid
bool is_valid_ether_addr(const u8 * addr);
addr
Pointer to a six-byte array containing the Ethernet address
Check that the Ethernet address (MAC) is not 00:00:00:00:00:00, is not a multicast address, and is not FF:FF:FF:FF:FF:FF.
Return true if the address is valid.
addr must be aligned to u16.