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/xilinx-ppc440-generic_defconfig b/configs/xilinx-ppc440-generic_defconfig
index cac8785..398362b 100644
--- a/configs/xilinx-ppc440-generic_defconfig
+++ b/configs/xilinx-ppc440-generic_defconfig
@@ -2,3 +2,7 @@
 CONFIG_4xx=y
 CONFIG_TARGET_XILINX_PPC440_GENERIC=y
 CONFIG_SYS_EXTRA_OPTIONS="SYS_TEXT_BASE=0x04000000,RESET_VECTOR_ADDRESS=0x04100000,BOOT_FROM_XMD=1"
+# CONFIG_CMD_IMLS is not set
+# CONFIG_CMD_SETEXPR is not set
+# CONFIG_CMD_NET is not set
+# CONFIG_CMD_NFS is not set