greth: Move the Aeroflex Gaisler driver

Move the Aeroflex Gaisler driver into drivers/net/ethernet/aeroflex/
and make the necessary Kconfig and Makefile changes.

CC: Kristoffer Glembo <kristoffer@gaisler.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
diff --git a/drivers/net/ethernet/aeroflex/Kconfig b/drivers/net/ethernet/aeroflex/Kconfig
new file mode 100644
index 0000000..4f4a8d7
--- /dev/null
+++ b/drivers/net/ethernet/aeroflex/Kconfig
@@ -0,0 +1,11 @@
+#
+# Aeroflex Gaisler network device configuration
+#
+
+config GRETH
+	tristate "Aeroflex Gaisler GRETH Ethernet MAC support"
+	depends on SPARC
+	select PHYLIB
+	select CRC32
+	---help---
+	  Say Y here if you want to use the Aeroflex Gaisler GRETH Ethernet MAC.