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/mx31ads_defconfig b/configs/mx31ads_defconfig
index 20cadde..9ccf069 100644
--- a/configs/mx31ads_defconfig
+++ b/configs/mx31ads_defconfig
@@ -1,3 +1,6 @@
 CONFIG_ARM=y
 CONFIG_TARGET_MX31ADS=y
+CONFIG_CMD_SPI=y
 # CONFIG_CMD_SETEXPR is not set
+CONFIG_CMD_DHCP=y
+CONFIG_CMD_PING=y