Kconfig: Migrate MTDIDS_DEFAULT / MTDPARTS_DEFAULT

We move all instances of CONFIG_MTDIDS_DEFAULT and
CONFIG_MTDPARTS_DEFAULT from the header files to the defconfig files.
There's a few cases here where we need to expand upon what was in the
header file.

Tested-by: Adam Ford <aford173@gmail.com>  #omap3_logic
Signed-off-by: Tom Rini <trini@konsulko.com>
diff --git a/configs/sheevaplug_defconfig b/configs/sheevaplug_defconfig
index ce56075..6145077 100644
--- a/configs/sheevaplug_defconfig
+++ b/configs/sheevaplug_defconfig
@@ -20,6 +20,8 @@
 CONFIG_CMD_EXT4=y
 CONFIG_CMD_FAT=y
 CONFIG_CMD_JFFS2=y
+CONFIG_MTDIDS_DEFAULT="nand0=orion_nand"
+CONFIG_MTDPARTS_DEFAULT="mtdparts=orion_nand:512K(uboot),512K(env),4M(kernel),-(rootfs)"
 CONFIG_CMD_UBI=y
 CONFIG_ISO_PARTITION=y
 CONFIG_ENV_IS_IN_NAND=y