[RISCV] Remove note of Sscofpmf and add a newline after FeatureStdExtSscofpmf (#83958)

To address comments after committing #83831.

Author: wangpc-pp

llvm/docs/RISCVUsage.rst

@@ -101,7 +101,7 @@ on support follow.
      ``Smepmp``        Supported
      ``Ssaia``         Supported
      ``Ssccptr``       Assembly Support (`See note <#riscv-profiles-extensions-note>`__)
-     ``Sscofpmf``      Assembly Support (`See note <#riscv-profiles-extensions-note>`__)
+     ``Sscofpmf``      Assembly Support
      ``Sscounterenw``  Assembly Support (`See note <#riscv-profiles-extensions-note>`__)
      ``Ssstateen``     Assembly Support (`See note <#riscv-profiles-extensions-note>`__)
      ``Ssstrict``      Assembly Support (`See note <#riscv-profiles-extensions-note>`__)
@@ -235,7 +235,7 @@ Supported
 
 .. _riscv-profiles-extensions-note:
 
-``Za128rs``, ``Za64rs``, ``Zic64b``, ``Ziccamoa``, ``Ziccif``, ``Zicclsm``, ``Ziccrse``, ``Shcounterenvw``, ``Shgatpa``, ``Shtvala``, ``Shvsatpa``, ``Shvstvala``, ``Shvstvecd``, ``Ssccptr``, ``Sscofpmf``, ``Sscounterenw``, ``Ssstateen``, ``Ssstrict``, ``Sstvala``, ``Sstvecd``, ``Ssu64xl``, ``Svade``, ``Svbare``
+``Za128rs``, ``Za64rs``, ``Zic64b``, ``Ziccamoa``, ``Ziccif``, ``Zicclsm``, ``Ziccrse``, ``Shcounterenvw``, ``Shgatpa``, ``Shtvala``, ``Shvsatpa``, ``Shvstvala``, ``Shvstvecd``, ``Ssccptr``, ``Sscounterenw``, ``Ssstateen``, ``Ssstrict``, ``Sstvala``, ``Sstvecd``, ``Ssu64xl``, ``Svade``, ``Svbare``
   These extensions are defined as part of the `RISC-V Profiles specification <https://github.com/riscv/riscv-profiles/releases/tag/v1.0>`__.  They do not introduce any new features themselves, but instead describe existing hardware features.
 
   .. _riscv-zacas-note:

llvm/lib/Target/RISCV/RISCVFeatures.td

@@ -810,6 +810,7 @@ def FeatureStdExtSsccptr
 def FeatureStdExtSscofpmf
     : SubtargetFeature<"sscofpmf", "HasStdExtSscofpmf", "true",
                        "'Sscofpmf' (Count Overflow and Mode-Based Filtering)", []>;
+
 def FeatureStdExtShcounterenw
     : SubtargetFeature<"shcounterenw", "HasStdExtShcounterenw", "true",
                        "'Shcounterenw' (Support writeable hcounteren enable "