Ignore the initramfs passed by the bootloader

configname: CONFIG_INITRAMFS_FORCE

Linux Kernel Configuration
└─>Ignore the initramfs passed by the bootloader
In linux kernel since version 4.2 (release Date: 2015-08-30)  
This option causes the kernel to ignore the initramfs image
(or initrd image) passed to it by the bootloader. This is
analogous to CMDLINE_FORCE, which is found on some architectures,
and is useful if you cannot or don't want to change the image
your bootloader passes to the kernel.