[mips] Minor update to the comment (NFC)

llvm-svn: 320354
diff --git a/clang/lib/Basic/Targets/Mips.cpp b/clang/lib/Basic/Targets/Mips.cpp
index 5563505..a8a1bcc 100644
--- a/clang/lib/Basic/Targets/Mips.cpp
+++ b/clang/lib/Basic/Targets/Mips.cpp
@@ -206,7 +206,7 @@
 }
 
 bool MipsTargetInfo::validateTarget(DiagnosticsEngine &Diags) const {
-  // microMIPS64R6 backend is removed
+  // microMIPS64R6 backend was removed.
   if ((getTriple().getArch() == llvm::Triple::mips64 ||
        getTriple().getArch() == llvm::Triple::mips64el) &&
        IsMicromips && (ABI == "n32" || ABI == "n64")) {