CONFIG_EARLY_PRINTK is not available for the selected architecture x86.
Result is shown for architecture s390

CONFIG_EARLY_PRINTK (not configurable)

modulename: serial.ko

and/or

early_printk.ko

and/or

early_console.ko

and/or

ip27-console.ko

and/or

ip30-console.ko

configname: CONFIG_EARLY_PRINTK

Linux Kernel Configuration
└─>EARLY_PRINTK
In linux kernel since version 2.6.12 )
source code:
arch/mips/loongson2ef/common/serial.c