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/Kconfig b/drivers/memory/Kconfig
index 56b89f1..22cb9d6 100644
--- a/drivers/memory/Kconfig
+++ b/drivers/memory/Kconfig
@@ -13,6 +13,13 @@
 	  SRAM, Ethernet adapters, FPGAs, etc.
 	  For now this uclass has no methods yet.
 
+config ATMEL_EBI
+	bool "Support for Atmel EBI"
+	help
+	  Driver for Atmel EBI controller. This is a dummy
+	  driver. Doesn't provide an access to EBI controller. Select
+	  this option to enable the NAND flash controller driver
+
 config SANDBOX_MEMORY
 	bool "Enable Sandbox Memory Controller driver"
 	depends on SANDBOX && MEMORY