The bootloader element now has variable
DIB_BOOTLOADER_VIRTUAL_TERMINAL to customize or suppress the
console=tty0 kernel argument.
This is proposed to allow console=tty0 to be removed entirely as it is
causing significant performance degredation in DPDK environments.
Change-Id: Iba2ee5b8a6b4acdd236a770550dffd29c784ce11
Related: rhbz#2179366