Use StringReg in TargetParser APIs (NFC)

llvm-svn: 283527
diff --git a/llvm/lib/Target/ARM/AsmParser/ARMAsmParser.cpp b/llvm/lib/Target/ARM/AsmParser/ARMAsmParser.cpp
index ffff0e5..8c63bea 100644
--- a/llvm/lib/Target/ARM/AsmParser/ARMAsmParser.cpp
+++ b/llvm/lib/Target/ARM/AsmParser/ARMAsmParser.cpp
@@ -9729,7 +9729,7 @@
   StringRef FPU = getParser().parseStringToEndOfStatement().trim();
 
   unsigned ID = ARM::parseFPU(FPU);
-  std::vector<const char *> Features;
+  std::vector<StringRef> Features;
   if (!ARM::getFPUFeatures(ID, Features)) {
     Error(FPUNameLoc, "Unknown FPU name");
     return false;