[M] Change in coreboot[main]: arch/riscv: Factor out common romstage code

[Maximilian Brune (Code Review)]

Attention is currently required from: Philipp Hug, Ron Minnich.

Hello Philipp Hug, Ron Minnich,

I'd like you to reexamine a change. Please visit

https://review.coreboot.org/c/coreboot/+/83098?usp=email

to look at the new patch set (#2).

Change subject: arch/riscv: Factor out common romstage code
......................................................................

arch/riscv: Factor out common romstage code

Adopt a similar style like we use on aarch64 and factor out the entry
functions for romstage (with and without SEPARATE_ROMSTAGE).

Signed-off-by: Maximilian Brune 
Change-Id: Ieb11d2644bf42dacf89ef15b2ec51286fe729d64
---
M src/arch/riscv/Makefile.mk
A src/arch/riscv/include/arch/stages.h
R src/arch/riscv/romstage.c
M src/mainboard/emulation/qemu-riscv/Makefile.mk
M src/mainboard/emulation/spike-riscv/Makefile.mk
D src/mainboard/emulation/spike-riscv/romstage.c
M src/mainboard/sifive/hifive-unleashed/romstage.c
M src/mainboard/sifive/hifive-unmatched/romstage.c
8 files changed, 32 insertions(+), 35 deletions(-)

git pull ssh://review.coreboot.org:29418/coreboot refs/changes/98/83098/2