Fix errors after rebasing and add a release note

Author: wangpc-pp

clang/docs/ReleaseNotes.rst

@@ -217,6 +217,8 @@ LoongArch Support
 RISC-V Support
 ^^^^^^^^^^^^^^
 
+- Add support for `-mtune=generic-ooo` (a generic out-of-order model).
+
 CUDA/HIP Language Changes
 ^^^^^^^^^^^^^^^^^^^^^^^^^
 

llvm/lib/Target/RISCV/RISCVSchedGenericOOO.td

@@ -494,7 +494,6 @@ def : ReadAdvance<ReadFSqrt16, 0>;
 //===----------------------------------------------------------------------===//
 defm : UnsupportedSchedV;
 defm : UnsupportedSchedZvk;
-defm : UnsupportedSchedZvkned;
 defm : UnsupportedSchedSFB;
 defm : UnsupportedSchedXsfvcp;
 }