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/drivers/memory/Makefile b/drivers/memory/Makefile
index 2b196d7..1cabf8a 100644
--- a/drivers/memory/Makefile
+++ b/drivers/memory/Makefile
@@ -2,5 +2,6 @@
 obj-$(CONFIG_MEMORY) += memory-uclass.o
 obj-$(CONFIG_SANDBOX_MEMORY) += memory-sandbox.o
 obj-$(CONFIG_STM32_FMC2_EBI) += stm32-fmc2-ebi.o
+obj-$(CONFIG_ATMEL_EBI) += atmel_ebi.o
 obj-$(CONFIG_TI_AEMIF) += ti-aemif.o
 obj-$(CONFIG_TI_GPMC) += ti-gpmc.o