Rename getMaximumUnrollFactor -> getMaxInterleaveFactor; also rename option names controlling this variable.

"Unroll" is not the appropriate name for this variable. Clang already uses 
the term "interleave" in pragmas and metadata for this.

Differential Revision: http://reviews.llvm.org/D5066

llvm-svn: 217528
diff --git a/llvm/lib/Target/ARM/ARMTargetTransformInfo.cpp b/llvm/lib/Target/ARM/ARMTargetTransformInfo.cpp
index 4635e43..75a556a 100644
--- a/llvm/lib/Target/ARM/ARMTargetTransformInfo.cpp
+++ b/llvm/lib/Target/ARM/ARMTargetTransformInfo.cpp
@@ -104,7 +104,7 @@
     return 32;
   }
 
-  unsigned getMaximumUnrollFactor() const override {
+  unsigned getMaxInterleaveFactor() const override {
     // These are out of order CPUs:
     if (ST->isCortexA15() || ST->isSwift())
       return 2;