Complete migration of MTDPARTS_DEFAULT / MTDIDS_DEFAULT, include in environment

- Ensure that everyone setting mtdids= and mtdparts= is doing so via the
  CONFIG options.
- If the CONFIG options are set, ensure that the default environment
  sets mtdparts / mtdids.

Signed-off-by: Tom Rini <trini@konsulko.com>
diff --git a/configs/ib62x0_defconfig b/configs/ib62x0_defconfig
index 4771e72..6ed3d68 100644
--- a/configs/ib62x0_defconfig
+++ b/configs/ib62x0_defconfig
@@ -37,6 +37,7 @@
 CONFIG_CMD_FAT=y
 CONFIG_CMD_JFFS2=y
 CONFIG_CMD_MTDPARTS=y
+CONFIG_MTDIDS_DEFAULT="nand0=orion_nand"
 CONFIG_MTDPARTS_DEFAULT="mtdparts=orion_nand:0xe0000@0x0(uboot),0x20000@0xe0000(uboot_env),-@0x100000(root)"
 CONFIG_CMD_UBI=y
 CONFIG_ISO_PARTITION=y