Change in coreboot[master]: riscv: add physical memory protection(PMP) support

[Xiang Wang (Code Review)]

Hello build bot (Jenkins),

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

https://review.coreboot.org/28569

to look at the new patch set (#3).

Change subject: riscv: add physical memory protection(PMP) support
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riscv: add physical memory protection(PMP) support

Change-Id: I2e9e0c94e6518f63ade7680a3ce68bacfae219d4
Signed-off-by: Xiang Wang 
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A src/arch/riscv/include/arch/pmp.h
A src/arch/riscv/pmp.c
2 files changed, 340 insertions(+), 0 deletions(-)

git pull ssh://review.coreboot.org:29418/coreboot refs/changes/69/28569/3