Move defaults from config_cmd_default.h to Kconfig

This sets the default commands Kconfig to match
include/config_cmd_default.h commands in the common/Kconfig and removes
them from include/configs.

Signed-off-by: Joe Hershberger <joe.hershberger@ni.com>
[trini: rastaban, am43xx_evm_usbhost_boot, am43xx_evm_ethboot updates]
Signed-off-by: Tom Rini <trini@konsulko.com>
diff --git a/configs/ventana_defconfig b/configs/ventana_defconfig
index 0a6e10f..f728585 100644
--- a/configs/ventana_defconfig
+++ b/configs/ventana_defconfig
@@ -3,7 +3,12 @@
 CONFIG_TEGRA20=y
 CONFIG_TARGET_VENTANA=y
 CONFIG_DEFAULT_DEVICE_TREE="tegra20-ventana"
-CONFIG_CMD_NET=y
+# CONFIG_CMD_IMI is not set
+# CONFIG_CMD_IMLS is not set
+# CONFIG_CMD_FLASH is not set
+# CONFIG_CMD_FPGA is not set
+# CONFIG_CMD_SETEXPR is not set
+# CONFIG_CMD_NFS is not set
 CONFIG_SPL_DM=y
 CONFIG_USB=y
 CONFIG_DM_USB=y