Move expression visitation logic up to MCStreamer.

Remove the duplicate from MCRecordStreamer. No functionality change.

llvm-svn: 211714
diff --git a/llvm/lib/Target/PowerPC/MCTargetDesc/PPCMCExpr.cpp b/llvm/lib/Target/PowerPC/MCTargetDesc/PPCMCExpr.cpp
index e4740c2..3ac0aca 100644
--- a/llvm/lib/Target/PowerPC/MCTargetDesc/PPCMCExpr.cpp
+++ b/llvm/lib/Target/PowerPC/MCTargetDesc/PPCMCExpr.cpp
@@ -128,6 +128,6 @@
   return true;
 }
 
-void PPCMCExpr::visitUsedExpr(MCObjectStreamer &Streamer) const {
+void PPCMCExpr::visitUsedExpr(MCStreamer &Streamer) const {
   Streamer.visitUsedExpr(*getSubExpr());
 }