ethtool: Add SFF 8636 date code parsing support

Parse date codes according to SFF 8636 and print them to output.

ethtool -m ethX
	[...]
        Date code : 160220

Signed-off-by: Saeed Mahameed <saeedm@mellanox.com>
Reviewed-by: Gal Pressman <galp@mellanox.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
2 files changed