macb: Move the Atmel driver

Move the Atmel driver into drivers/net/ethernet/cadence/ and
make the necessary Kconfig and Makefile changes.

CC: Nicolas Ferre <nicolas.ferre@atmel.com>
CC: Jamie Iles <jamie@jamieiles.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
Acked-by: Jamie Iles <jamie@jamieiles.com>
Acked-by: Nicolas Ferre <nicolas.ferre@atmel.com>
diff --git a/MAINTAINERS b/MAINTAINERS
index 15d7021..ae60f8c 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -1323,7 +1323,7 @@
 ATMEL MACB ETHERNET DRIVER
 M:	Nicolas Ferre <nicolas.ferre@atmel.com>
 S:	Supported
-F:	drivers/net/macb.*
+F:	drivers/net/ethernet/cadence/
 
 ATMEL SPI DRIVER
 M:	Nicolas Ferre <nicolas.ferre@atmel.com>