Convert CONFIG_SYS_NAND_MAX_CHIPS to Kconfig

This converts the following to Kconfig:
   CONFIG_SYS_NAND_MAX_CHIPS

Signed-off-by: Tom Rini <trini@konsulko.com>
diff --git a/drivers/mtd/Kconfig b/drivers/mtd/Kconfig
index b303fab..83c055a 100644
--- a/drivers/mtd/Kconfig
+++ b/drivers/mtd/Kconfig
@@ -111,6 +111,14 @@
 
 source "drivers/mtd/nand/Kconfig"
 
+config SYS_NAND_MAX_CHIPS
+	int "NAND max chips"
+	depends on MTD_RAW_NAND || CMD_ONENAND || TARGET_S5PC210_UNIVERSAL || \
+		SPL_OMAP3_ID_NAND
+	default 1
+	help
+	  The maximum number of NAND chips per device to be supported.
+
 source "drivers/mtd/spi/Kconfig"
 
 source "drivers/mtd/ubi/Kconfig"
diff --git a/drivers/mtd/nand/raw/Kconfig b/drivers/mtd/nand/raw/Kconfig
index 796041a..7da3983 100644
--- a/drivers/mtd/nand/raw/Kconfig
+++ b/drivers/mtd/nand/raw/Kconfig
@@ -423,13 +423,6 @@
 	    not available while configuring controller. So a static CONFIG_NAND_xx
 	    is needed to know the device's bus-width in advance.
 
-config SYS_NAND_MAX_CHIPS
-	int "NAND max chips"
-	default 1
-	depends on NAND_ARASAN
-	help
-	  The maximum number of NAND chips per device to be supported.
-
 if SPL
 
 config SYS_NAND_5_ADDR_CYCLE