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/atngw100_defconfig b/configs/atngw100_defconfig
index b1bf01f..0f5be56 100644
--- a/configs/atngw100_defconfig
+++ b/configs/atngw100_defconfig
@@ -4,5 +4,8 @@
 CONFIG_AUTOBOOT_PROMPT="Press SPACE to abort autoboot in %d seconds\n"
 CONFIG_AUTOBOOT_DELAY_STR="d"
 CONFIG_AUTOBOOT_STOP_STR=" "
-CONFIG_CMD_NET=y
+# CONFIG_CMD_XIMG is not set
+# CONFIG_CMD_FPGA is not set
+# CONFIG_CMD_SOURCE is not set
+# CONFIG_CMD_SETEXPR is not set
 CONFIG_SPI_FLASH=y