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/ids8313_defconfig b/configs/ids8313_defconfig
index 4ee97ae..246cc3d 100644
--- a/configs/ids8313_defconfig
+++ b/configs/ids8313_defconfig
@@ -199,4 +199,5 @@
 CONFIG_RTC_PCF8563=y
 CONFIG_SYS_NS16550=y
 CONFIG_WATCHDOG=y
+CONFIG_JFFS2_NAND=y
 CONFIG_OF_LIBFDT=y