[llvm] [RISCV] Update the canonical extension order (PR #192392)

[Craig Topper via llvm-commits]

================
@@ -21,7 +21,7 @@
 namespace llvm {
 
 namespace RISCVISAUtils {
-constexpr StringLiteral AllStdExts = "mafdqlcbkjtpvnh";
+constexpr StringLiteral AllStdExts = "mafdqlcbkjtvphn";
----------------
topperc wrote:

Delete the "n". It's not used.

https://github.com/llvm/llvm-project/pull/192392