efi: move bus driver to driver/efi ...

Signed-off-by: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

net: efi: correct function signature of set_ethaddr ...

Signed-off-by: Lucas Stach <dev@lynxeye.de>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

net: Add EFI Simple Network Protocol Driver ...

This adds a network driver which uses the EFI Simple Network
Protocol to implement networking for barebox.

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>