sfc: Move the Solarflare drivers

Moves the Solarflare drivers into drivers/net/ethernet/sfc/ and
make the necessary Kconfig and Makefile changes.

CC: Steve Hodgson <shodgson@solarflare.com>
CC: Ben Hutchings <bhutchings@solarflare.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>

drivers/net/ethernet/sfc/Makefile

@@ -0,0 +1,8 @@
+sfc-y			+= efx.o nic.o falcon.o siena.o tx.o rx.o filter.o \
+			   falcon_xmac.o mcdi_mac.o \
+			   selftest.o ethtool.o qt202x_phy.o mdio_10g.o \
+			   tenxpress.o txc43128_phy.o falcon_boards.o \
+			   mcdi.o mcdi_phy.o
+sfc-$(CONFIG_SFC_MTD)	+= mtd.o
+
+obj-$(CONFIG_SFC)	+= sfc.o