eth16i: Move the Allied Telesis/Fujitsu drivers

Move the Allied Telesis/Fujitsu drivers into drivers/net/ethernet/fujitsu/
and make the necessary Kconfig and Makefile changes.

CC: Shingo Fujimoto <shingo@flab.fujitsu.co.jp>
CC: Yutaka Tamiya <tamy@flab.fujitsu.co.jp>
CC: Rene Schmit <rene@bss.lu>
CC: Mika Kuoppala <miku@iki.fi>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>