[CodeGen] Rename DEBUG_TYPE to match passnames

Rename missing DEBUG_TYPE "machine-scheduler" from backend files, which were
absent from https://reviews.llvm.org/rL303921.

Differential revision: https://reviews.llvm.org/D35231

llvm-svn: 307719
diff --git a/llvm/lib/Target/SystemZ/SystemZHazardRecognizer.cpp b/llvm/lib/Target/SystemZ/SystemZHazardRecognizer.cpp
index fe4b52b..73a1036 100644
--- a/llvm/lib/Target/SystemZ/SystemZHazardRecognizer.cpp
+++ b/llvm/lib/Target/SystemZ/SystemZHazardRecognizer.cpp
@@ -26,7 +26,7 @@
 
 using namespace llvm;
 
-#define DEBUG_TYPE "misched"
+#define DEBUG_TYPE "machine-scheduler"
 
 // This is the limit of processor resource usage at which the
 // scheduler should try to look for other instructions (not using the