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/bf537-stamp_defconfig b/configs/bf537-stamp_defconfig
index 9768bd6..294d0d9 100644
--- a/configs/bf537-stamp_defconfig
+++ b/configs/bf537-stamp_defconfig
@@ -1,6 +1,6 @@
 CONFIG_BLACKFIN=y
 CONFIG_TARGET_BF537_STAMP=y
-CONFIG_CMD_NET=y
+# CONFIG_CMD_SETEXPR is not set
 CONFIG_NET_RANDOM_ETHADDR=y
 CONFIG_SPI_FLASH=y
 CONFIG_CC_OPTIMIZE_LIBS_FOR_SPEED=y