bf537-stamp: remove already defined is_zero_ether_addr and is_multicast_ether_addr

and move is_valid_ether_addr board file

Signed-off-by: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>
Signed-off-by: Ben Warren <biggerbadderben@gmail.com>
2 files changed