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/wandboard_defconfig b/configs/wandboard_defconfig
index eaa5962..62666ff 100644
--- a/configs/wandboard_defconfig
+++ b/configs/wandboard_defconfig
@@ -2,7 +2,7 @@
 CONFIG_TARGET_WANDBOARD=y
 CONFIG_SPL=y
 CONFIG_SYS_EXTRA_OPTIONS="IMX_CONFIG=arch/arm/imx-common/spl_sd.cfg,MX6QDL"
-CONFIG_CMD_SETEXPR=y
-CONFIG_CMD_NET=y
+# CONFIG_CMD_IMLS is not set
+# CONFIG_CMD_FLASH is not set
 CONFIG_DM=y
 CONFIG_DM_THERMAL=y