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/zmx25_defconfig b/configs/zmx25_defconfig
index 955bf37..0578850 100644
--- a/configs/zmx25_defconfig
+++ b/configs/zmx25_defconfig
@@ -6,4 +6,7 @@
 CONFIG_AUTOBOOT_PROMPT="boot in %d s\n"
 CONFIG_AUTOBOOT_DELAY_STR="delaygs"
 CONFIG_AUTOBOOT_STOP_STR="stopgs"
+CONFIG_CMD_USB=y
 # CONFIG_CMD_SETEXPR is not set
+CONFIG_CMD_DHCP=y
+CONFIG_CMD_PING=y