Reorder includes in Target backends to following coding standards. Remove some superfluous forward declarations.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@152997 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Target/Sparc/SparcInstrInfo.h b/lib/Target/Sparc/SparcInstrInfo.h
index 4932531..204f698 100644
--- a/lib/Target/Sparc/SparcInstrInfo.h
+++ b/lib/Target/Sparc/SparcInstrInfo.h
@@ -14,8 +14,8 @@
 #ifndef SPARCINSTRUCTIONINFO_H
 #define SPARCINSTRUCTIONINFO_H
 
-#include "llvm/Target/TargetInstrInfo.h"
 #include "SparcRegisterInfo.h"
+#include "llvm/Target/TargetInstrInfo.h"
 
 #define GET_INSTRINFO_HEADER
 #include "SparcGenInstrInfo.inc"