unwind: cleanup -Wunused-parameter

Cleanup a number of `-Wunused-parameter` warnings.  NFC.

git-svn-id: https://llvm.org/svn/llvm-project/libunwind/trunk@246528 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/src/Registers.hpp b/src/Registers.hpp
index 38ce066..875ea20 100644
--- a/src/Registers.hpp
+++ b/src/Registers.hpp
@@ -1797,27 +1797,28 @@
   _LIBUNWIND_ABORT("unsupported or1k register");
 }
 
-inline bool Registers_or1k::validFloatRegister(int regNum) const {
+inline bool Registers_or1k::validFloatRegister(int /* regNum */) const {
   return false;
 }
 
-inline double Registers_or1k::getFloatRegister(int regNum) const {
+inline double Registers_or1k::getFloatRegister(int /* regNum */) const {
   _LIBUNWIND_ABORT("or1k float support not implemented");
 }
 
-inline void Registers_or1k::setFloatRegister(int regNum, double value) {
+inline void Registers_or1k::setFloatRegister(int /* regNum */,
+                                             double /* value */) {
   _LIBUNWIND_ABORT("or1k float support not implemented");
 }
 
-inline bool Registers_or1k::validVectorRegister(int regNum) const {
+inline bool Registers_or1k::validVectorRegister(int /* regNum */) const {
   return false;
 }
 
-inline v128 Registers_or1k::getVectorRegister(int regNum) const {
+inline v128 Registers_or1k::getVectorRegister(int /* regNum */) const {
   _LIBUNWIND_ABORT("or1k vector support not implemented");
 }
 
-inline void Registers_or1k::setVectorRegister(int regNum, v128 value) {
+inline void Registers_or1k::setVectorRegister(int /* regNum */, v128 /* value */) {
   _LIBUNWIND_ABORT("or1k vector support not implemented");
 }