configs: Migrate RBTREE, LZO, CMD_MTDPARTS, CMD_UBI and CMD_UBIFS

The above CONFIG options are in Kconfig, and now have correct depends and
inter-dependencies.  Migrate these to configs/ from include/configs/.  In the
case of CMD_UBIFS also change it to be a default y if CMD_UBI.

Signed-off-by: Tom Rini <trini@konsulko.com>
diff --git a/configs/portl2_defconfig b/configs/portl2_defconfig
index a0faba5..d4172df 100644
--- a/configs/portl2_defconfig
+++ b/configs/portl2_defconfig
@@ -21,6 +21,7 @@
 CONFIG_CMD_PING=y
 CONFIG_CMD_JFFS2=y
 CONFIG_CMD_UBI=y
+# CONFIG_CMD_UBIFS is not set
 # CONFIG_MMC is not set
 CONFIG_SPI_FLASH=y
 CONFIG_SPI_FLASH_STMICRO=y