fixup! Move extensions definition

Author: sunshaoce

llvm/lib/Target/RISCV/RISCVFeatures.td

@@ -842,14 +842,12 @@ def HasStdExtH : Predicate<"Subtarget->hasStdExtH()">,
                  AssemblerPredicate<(all_of FeatureStdExtH),
                                     "'H' (Hypervisor)">;
 
-// Debugger extensions
+// Supervisor extensions
 
 def FeatureStdExtSdext : RISCVExperimentalExtension<1, 0, "External debugger">;
 
 def FeatureStdExtSdtrig : RISCVExperimentalExtension<1, 0, "Debugger triggers">;
 
-// Supervisor extensions
-
 def FeatureStdExtShgatpa
     : RISCVExtension<1, 0,
                      "SvNNx4 mode supported for all modes supported by satp, as well as Bare">;