seeq: Move the SEEQ drivers

Move the drivers that use SEEQ chipset into drivers/net/ethernet/seeq
and make the necessary Kconfig and Makefile changes.

CC: Russell King <linux@arm.linux.org.uk>
CC: Hamish Coleman <hamish@zot.apana.org.au>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>