We followed below steps,
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Disabled from kernel configuration
#CONFIG_SERIAL_MSM_CONSOLE is not set
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uboot-1.0/include/configs/ ipq40xx_cdp.h
#add below macros to disable console from uboot
#define CONFIG_DISABLE_CONSOLE
#define CONFIG_SILENT_CONSOLE
#define CONFIG_SYS_DEVICE_NULLDEV
#define CONFIG_SILENT_CONSOLE_UPDATE_ON_RELOC
#removied below file macro to stop TFTP
/*#define CONFIG_CMD_TFTPPUT */
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uboot-1.0/board/qcom/ipq40xx_cdp/ ipq40xx_cdp.c
gd->flags |= (GD_FLG_SILENT | GD_FLG_DISABLE_CONSOLE);
After installing the image, we observed that all WiFi interfaces are down and the WiFi menu tab got disappeared.
Please suggest me, how can I block serial console?