Use the range variant of find_if instead of unpacking begin/end

No functionality change is intended.

llvm-svn: 278443
diff --git a/llvm/lib/Target/Hexagon/HexagonFrameLowering.cpp b/llvm/lib/Target/Hexagon/HexagonFrameLowering.cpp
index 2530b5f..17f227a 100644
--- a/llvm/lib/Target/Hexagon/HexagonFrameLowering.cpp
+++ b/llvm/lib/Target/Hexagon/HexagonFrameLowering.cpp
@@ -838,7 +838,7 @@
     auto IfR = [Reg] (const CalleeSavedInfo &C) -> bool {
       return C.getReg() == Reg;
     };
-    auto F = std::find_if(CSI.begin(), CSI.end(), IfR);
+    auto F = find_if(CSI, IfR);
     if (F == CSI.end())
       continue;