ext: spmp (1.0.0-rc2): new PMP entry field

[Binno Shen (binno)]

These two fields are defined separately for PMP entry in SPMP extension.

• Reference
  1. rv-spmp-spce 1.0.0-rc2
     https://github.com/riscv/riscv-spmp/tree/main

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 97.08%. Comparing base (383cbca) to head (04d913e).
⚠️ Report is 41 commits behind head on master.

Additional details and impacted files

@@            Coverage Diff             @@
##           master     #388      +/-   ##
==========================================
+ Coverage   96.53%   97.08%   +0.55%     
==========================================
  Files          10       14       +4     
  Lines         750      926     +176     
==========================================
+ Hits          724      899     +175     
- Misses         26       27       +1     

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.

🚀 New features to boost your workflow:

• ❄️ Test Analytics: Detect flaky tests, report on failures, and find test suite problems.

[Chih-Min Chao (chihminchao)]

I think it is based on 1.0.0-rc2. It is better to describe it in commit log

[Andrew Waterman (aswaterman)]

OK, ping me after the commit message is updated and I'll merge.

[Binno Shen (binno)]

Hi Andrew Waterman (@aswaterman) ,
The commit message is updated