CONFIG_BOOTLOADER_DRIVER is not available for thedefaultarchitecture x86.
Result is shown for architecture mips
default or selected kernelversion does not have config value CONFIG_BOOTLOADER_DRIVER.
Result is shown for kernelversion 6.2.5

PowerTV Bootloader Driver Support

configname: CONFIG_BOOTLOADER_DRIVER

Linux Kernel Configuration
└─>PowerTV Bootloader Driver Support
In linux kernel since version 2.6.33 (release Date: 2010-02-24)  
Use this option if you want to load bootloader driver.

depends
CONFIG_POWERTV