grub> linux (hd0,msdos2)/vmlinuz-4..0-0.rc6.git1.1.fc25.hrw1.aarch64 root=/dev/mmc0p console=ttyS0 sun50i-a64-pine64-plus.dtb
grub> devicetree (hd0,msdos2)/dtb-4..0-0.rc6.git1.1.fc25.hrw1.aarch64/allwinner/pine64_plus.dtb

grub>boot
EFI stub: Booting Linux Kernel...
EFI stub: UEFI Secure Boot is enabled.
EFI stub: Generating empty DTB
EFI stub: Exiting boot services and installing virtual address map...
U-Boot EFI: Relocation at 00000000bffac250 is out of range (1fffb628)
U-Boot EFI: Relocation at 00000000bffac260 is out of range (1fffb640)
U-Boot EFI: Relocation at 00000000bffac270 is out of range (1fffb640)
U-Boot EFI: Relocation at 00000000bffac280 is out of range (1fffb4b0)