CONFIG_DEBUG_QCOM_UARTDM is not available for thedefaultarchitecture x86.
Result is shown for architecture arm

Kernel low-level debugging messages via QCOM UARTDM

configname: CONFIG_DEBUG_QCOM_UARTDM

Kernel low-level debugging port
└─>Kernel low-level debugging messages via QCOM UARTDM
In linux kernel since version 3.16 (release Date: 2014-08-03)  
Say Y here if you want the debug print routines to direct
their output to the serial port on Qualcomm devices.

ARCH DEBUG_UART_PHYS DEBUG_UART_VIRT
APQ8064 0x16640000 0xf0040000
APQ8084 0xf995e000 0xfa75e000
IPQ4019 0x078af000 0xf78af000
MSM8X60 0x19c40000 0xf0040000
MSM8960 0x16440000 0xf0040000
MSM8974 0xf991e000 0xfa71e000

Please adjust DEBUG_UART_PHYS and DEBUG_UART_BASE configuration
options based on your needs.