enc28j60: Move the Microchip driver

Move the Microchip driver into drivers/net/ethernet/microchip/ and
make the necessary Kconfig and Makefile changes.

CC: Claudio Lanconelli <lanconelli.claudio@eptar.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
diff --git a/drivers/net/ethernet/microchip/Makefile b/drivers/net/ethernet/microchip/Makefile
new file mode 100644
index 0000000..573d429
--- /dev/null
+++ b/drivers/net/ethernet/microchip/Makefile
@@ -0,0 +1,5 @@
+#
+# Makefile for the Microchip network device drivers.
+#
+
+obj-$(CONFIG_ENC28J60) += enc28j60.o