[S] Change in coreboot[main]: riscv/opensbi: make the opensbi payload a flat binary

[ron minnich (Code Review)]

Attention is currently required from: Arthur Heymans, Arthur Heymans, Jonathan Neuschäfer, Maximilian Brune, Philipp Hug.

ron minnich has posted comments on this change. ( https://review.coreboot.org/c/coreboot/+/81632?usp=email )

Change subject: riscv/opensbi: make the opensbi payload a flat binary
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Patch Set 4:

(2 comments)

File src/arch/riscv/Makefile.mk:

https://review.coreboot.org/c/coreboot/+/81632/comment/d947e1d8_ebb157e8 :
PS4, Line 178: $(OPENSBI_CBFS)-compression := non
> is it executed in place? or why not compress?

it is executed in place, it seems. So I went with not compressing.

File src/mainboard/emulation/qemu-riscv/memlayout.ld:

https://review.coreboot.org/c/coreboot/+/81632/comment/6e675b48_9dcd07e6 :
PS4, Line 9: #define ROMSTAGESIZE 0
> Why this change?

the bootblock and romstage are combined in one file. I see no reason to ever go back.