Convert CONFIG_JFFS2_DEV et al to Kconfig

This converts the following to Kconfig:
   CONFIG_JFFS2_DEV
   CONFIG_JFFS2_LZO
   CONFIG_JFFS2_NAND
   CONFIG_JFFS2_PART_OFFSET
   CONFIG_JFFS2_PART_SIZE

Signed-off-by: Tom Rini <trini@konsulko.com>
diff --git a/configs/devkit8000_defconfig b/configs/devkit8000_defconfig
index 4017eb6..4034f9c 100644
--- a/configs/devkit8000_defconfig
+++ b/configs/devkit8000_defconfig
@@ -27,6 +27,9 @@
 CONFIG_BOOTP_DNS2=y
 CONFIG_BOOTP_NTPSERVER=y
 CONFIG_CMD_JFFS2=y
+CONFIG_JFFS2_DEV="nand0"
+CONFIG_JFFS2_PART_OFFSET=0x680000
+CONFIG_JFFS2_PART_SIZE=0xF980000
 CONFIG_CMD_MTDPARTS=y
 CONFIG_MTDIDS_DEFAULT="nand0=nand"
 CONFIG_MTDPARTS_DEFAULT="mtdparts=nand:512k(x-loader),1920k(u-boot),128k(u-boot-env),4m(kernel),-(fs)"
@@ -50,4 +53,5 @@
 CONFIG_SYS_NAND_U_BOOT_LOCATIONS=y
 CONFIG_SYS_NAND_U_BOOT_OFFS=0x80000
 CONFIG_CONS_INDEX=3
+CONFIG_JFFS2_NAND=y
 CONFIG_OF_LIBFDT=y