default or selected kernelversion does not have config value CONFIG_SERIAL_SIRFSOC.
Result is shown for kernelversion 6.9.9
SiRF SoC Platform Serial port support
modulename: sirfsoc_uart.ko
configname: CONFIG_SERIAL_SIRFSOC
Linux Kernel Configuration
└─>Device Drivers
└─>Character devices
└─>Serial drivers
└─>SiRF SoC Platform Serial port support
In linux kernel since version 3.1 (release Date: 2011-10-24)
Support for the on-chip UART on the CSR SiRFprimaII series,
providing /dev/ttySiRF0, 1 and 2 (note, some machines may not
provide all of these ports, depending on how the serial port
pins are configured).
providing /dev/ttySiRF0, 1 and 2 (note, some machines may not
provide all of these ports, depending on how the serial port
pins are configured).