Comment 11 for bug 1785033

Test with Dell's machine on Bionic with the grub2 bionic-proposed,
got the correct 64-bit efi linear frame buffer address.

[ 0.965079] efifb: probing for efifb
[ 0.965086] efifb: framebuffer at 0x4000000000, using 8100k, total 8100k
[ 0.965087] efifb: mode is 1920x1080x32, linelength=7680, pages=1
[ 0.965088] efifb: scrolling: redraw
[ 0.965089] efifb: Truecolor: size=8:8:8:8, shift=24:16:8:0