configs: Re-sync almost all of cmd/Kconfig

This syncs up the current cmd/Kconfig and include/configs/ files with the
only exception being CMD_NAND.  Due to how we have used this historically
we need to take further care here when converting.

Signed-off-by: Tom Rini <trini@konsulko.com>
diff --git a/configs/canmb_defconfig b/configs/canmb_defconfig
index b1ec147..5caea0d 100644
--- a/configs/canmb_defconfig
+++ b/configs/canmb_defconfig
@@ -2,3 +2,5 @@
 CONFIG_MPC5xxx=y
 CONFIG_TARGET_CANMB=y
 # CONFIG_CMD_SETEXPR is not set
+CONFIG_CMD_DHCP=y
+CONFIG_CMD_SNTP=y