[S] Change in coreboot[main]: arch/riscv: add Kconfig variable RISCV_HAS_MENVCFG

[ron minnich (Code Review)]

Attention is currently required from: Maximilian Brune, Patrick Georgi, Philipp Hug, ron minnich.

Hello Martin L Roth, Maximilian Brune, Patrick Georgi, Philipp Hug,

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

https://review.coreboot.org/c/coreboot/+/81410?usp=email

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

Change subject: arch/riscv: add Kconfig variable RISCV_HAS_MENVCFG
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arch/riscv: add Kconfig variable RISCV_HAS_MENVCFG

Older parts do not have the menvcfg csr.
Provide a Kconfig variable, default y, to enable it.
Check the variable in the payload code, when coreboot SBI
is used, and print out if it is enabled.

Add constants for this new CSR.

Signed-off-by: Ronald G Minnich

Change-Id: I627dde377708cde2491d4abe625c482d64f7aa87
---
M src/arch/riscv/Kconfig
M src/arch/riscv/include/arch/encoding.h
M src/arch/riscv/payload.c
3 files changed, 17 insertions(+), 0 deletions(-)

git pull ssh://review.coreboot.org:29418/coreboot refs/changes/10/81410/2