boot/opensbi: add hash file
All downloads performed by buildroot should be integrity-checked if
possible. Enable integrity-checking for the RISC-V OpenSBI sources by
adding a corresponding hash file.
Signed-off-by: Karsten Merker <merker@debian.org>
Reviewed-by: Alistair Francis <alistair.francis@wdc.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>
Karsten Merker