Kconfig: Drop CONFIG_CMD_TFTP

This is not a valid CONFIG option. Drop it.

Signed-off-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
Reviewed-by: Philipp Tomsich <philipp.tomsich@theobroma-systems.com>

include/configs/dragonboard410c.h

@@ -49,7 +49,6 @@
 /* Enable that for switching of boot partitions */
 /* Disabled by default as some sub-commands can brick eMMC */
 /*#define CONFIG_SUPPORT_EMMC_BOOT */
-#define CONFIG_CMD_TFTP
 
 /* Partition table support */
 #define HAVE_BLOCK_DEVICE /* Needed for partition commands */

scripts/config_whitelist.txt

@@ -293,7 +293,6 @@ CONFIG_CM922T_XA10
 CONFIG_CMDLINE_EDITING
 CONFIG_CMDLINE_PS_SUPPORT
 CONFIG_CMDLINE_TAG
-CONFIG_CMD_TFTP
 CONFIG_CMD_THOR_DOWNLOAD
 CONFIG_CMD_TRACE
 CONFIG_CMD_TSI148