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/ml507_flash_defconfig b/configs/ml507_flash_defconfig
index fba47ef..442e0ce 100644
--- a/configs/ml507_flash_defconfig
+++ b/configs/ml507_flash_defconfig
@@ -2,3 +2,7 @@
 CONFIG_4xx=y
 CONFIG_TARGET_ML507=y
 CONFIG_SYS_EXTRA_OPTIONS="SYS_TEXT_BASE=0xF7F60000,RESET_VECTOR_ADDRESS=0xF7FFFFFC,INIT_TLB=board/xilinx/ppc440-generic/init.o"
+# CONFIG_CMD_IMLS is not set
+# CONFIG_CMD_SETEXPR is not set
+# CONFIG_CMD_NET is not set
+# CONFIG_CMD_NFS is not set