Convert CONFIG_NAND_FSL_ELBC et al to Kconfig

This converts the following to Kconfig:
   CONFIG_NAND_FSL_ELBC
   CONFIG_NAND_FSL_IFC

Note that a number of PowerPC platforms had previously enabled
CONFIG_NAND_FSL_ELBC without CONFIG_MTD_RAW_NAND, and now they no longer
enable the option, reducing the size of a few functions.

Signed-off-by: Tom Rini <trini@konsulko.com>
diff --git a/drivers/mtd/nand/raw/Kconfig b/drivers/mtd/nand/raw/Kconfig
index 7da3983..2e6fe14 100644
--- a/drivers/mtd/nand/raw/Kconfig
+++ b/drivers/mtd/nand/raw/Kconfig
@@ -126,6 +126,17 @@
 	  Enable the driver for NAND flash on platforms using a Denali NAND
 	  controller as a DT device.
 
+config NAND_FSL_ELBC
+	bool "Support Freescale Enhanced Local Bus Controller FCM NAND driver"
+	depends on FSL_ELBC
+	help
+	  Enable the Freescale Enhanced Local Bus Controller FCM NAND driver.
+
+config NAND_FSL_IFC
+	bool "Support Freescale Integrated Flash Controller NAND driver"
+	help
+	  Enable the Freescale Integrated Flash Controller NAND driver.
+
 config NAND_LPC32XX_MLC
 	bool "Support LPC32XX_MLC controller"
 	help