memory: atmel-ebi: add Atmel EBI (External Bus Interface) driver

The EBI is used to access peripherals like NAND, SRAM, NOR etc. Add
this driver to probe the nand flash controller. This is a dummy driver
and not yet a complete device driver for EBI.

Signed-off-by: Balamanikandan Gunasundar <balamanikandan.gunasundar@microchip.com>
diff --git a/MAINTAINERS b/MAINTAINERS
index 75b27bc..3a0aab4 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -409,6 +409,7 @@
 F:	arch/arm/mach-at91/
 F:	board/atmel/
 F:	drivers/cpu/at91_cpu.c
+F:	drivers/memory/atmel-ebi.c
 F:	drivers/misc/microchip_flexcom.c
 F:	drivers/timer/atmel_tcb_timer.c
 F:	include/dt-bindings/mfd/atmel-flexcom.h