Remove unused cl::opt, make another opt static.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@151398 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Target/ARM/ARMFrameLowering.cpp b/lib/Target/ARM/ARMFrameLowering.cpp
index 96b987a..f3a2197 100644
--- a/lib/Target/ARM/ARMFrameLowering.cpp
+++ b/lib/Target/ARM/ARMFrameLowering.cpp
@@ -27,7 +27,7 @@
 
 using namespace llvm;
 
-cl::opt<bool>
+static cl::opt<bool>
 SpillAlignedNEONRegs("align-neon-spills", cl::Hidden, cl::init(true),
                      cl::desc("Align ARM NEON spills in prolog and epilog"));