Use ATTRIBUTE_UNUSED more.

Use it in lieu of UNUSED(), which had some incorrect uses.

Change-Id: If247dce58b72056f6eea84968e7196f0b5bef4da
diff --git a/compiler/dex/quick/mips/call_mips.cc b/compiler/dex/quick/mips/call_mips.cc
index 8863c05..4a736f3d 100644
--- a/compiler/dex/quick/mips/call_mips.cc
+++ b/compiler/dex/quick/mips/call_mips.cc
@@ -32,9 +32,10 @@
 
 namespace art {
 
-bool MipsMir2Lir::GenSpecialCase(BasicBlock* bb, MIR* mir, const InlineMethod& special) {
+bool MipsMir2Lir::GenSpecialCase(BasicBlock* bb ATTRIBUTE_UNUSED,
+                                 MIR* mir ATTRIBUTE_UNUSED,
+                                 const InlineMethod& special ATTRIBUTE_UNUSED) {
   // TODO
-  UNUSED(bb, mir, special);
   return false;
 }