Merge pull request swiftlang#9863 from jasonmolenda/r143238845-dont-reuse-frame0-lr-on-leafless-frame-that-trapped

Revert "[lldb] Allow fetching of RA register when above fault handler(llvm#98566)"

Author: JDevlieghere

lldb/source/Target/RegisterContextUnwind.cpp

@@ -1402,7 +1402,7 @@ RegisterContextUnwind::SavedLocationForRegister(
       // it's still live in the actual register. Handle this specially.
 
       if (!have_unwindplan_regloc && return_address_reg.IsValid() &&
-          BehavesLikeZerothFrame()) {
+          IsFrameZero()) {
         if (return_address_reg.GetAsKind(eRegisterKindLLDB) !=
             LLDB_INVALID_REGNUM) {
           lldb_private::UnwindLLDB::ConcreteRegisterLocation new_regloc;