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/eb_cpu5282_defconfig b/configs/eb_cpu5282_defconfig
index 1e204bf..5dcf4ec 100644
--- a/configs/eb_cpu5282_defconfig
+++ b/configs/eb_cpu5282_defconfig
@@ -4,4 +4,6 @@
 CONFIG_SYS_EXTRA_OPTIONS="SYS_MONITOR_BASE=0xFF000400"
 CONFIG_SYS_PROMPT="\nEB+CPU5282> "
 # CONFIG_CMD_LOADB is not set
+CONFIG_CMD_I2C=y
 # CONFIG_CMD_SETEXPR is not set
+CONFIG_CMD_DHCP=y