Name
is_valid_ether_addr — 
     Determine if the given Ethernet address is valid
 
Synopsis
| bool is_valid_ether_addr ( | const u8 * addr ); | 
 
Arguments
- addr
- 
     Pointer to a six-byte array containing the Ethernet address
     
Description
   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.
Please note
   addr must be aligned to u16.