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/tb100_defconfig b/configs/tb100_defconfig
index c94118a..cc8f527 100644
--- a/configs/tb100_defconfig
+++ b/configs/tb100_defconfig
@@ -4,7 +4,9 @@
 CONFIG_SYS_CLK_FREQ=500000000
 CONFIG_SYS_TEXT_BASE=0x84000000
 CONFIG_DEFAULT_DEVICE_TREE="abilis_tb100"
-CONFIG_CMD_NET=y
+# CONFIG_CMD_IMLS is not set
+# CONFIG_CMD_FLASH is not set
+# CONFIG_CMD_SETEXPR is not set
 CONFIG_OF_CONTROL=y
 CONFIG_OF_EMBED=y
 CONFIG_DM=y