Allow regparm attribute for PNaCl target

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@141638 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Basic/Targets.cpp b/lib/Basic/Targets.cpp
index abb1f86..e63af6b 100644
--- a/lib/Basic/Targets.cpp
+++ b/lib/Basic/Targets.cpp
@@ -3418,6 +3418,7 @@
     this->SizeType = TargetInfo::UnsignedInt;
     this->PtrDiffType = TargetInfo::SignedInt;
     this->IntPtrType = TargetInfo::SignedInt;
+    this->RegParmMax = 2;
     DescriptionString = "e-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:64:64-"
                         "f32:32:32-f64:64:64-p:32:32:32-v128:32:32";
   }