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

llvm-svn: 152997
diff --git a/llvm/lib/Target/MSP430/MSP430InstrInfo.h b/llvm/lib/Target/MSP430/MSP430InstrInfo.h
index fe2a75c..04f339b 100644
--- a/llvm/lib/Target/MSP430/MSP430InstrInfo.h
+++ b/llvm/lib/Target/MSP430/MSP430InstrInfo.h
@@ -14,8 +14,8 @@
 #ifndef LLVM_TARGET_MSP430INSTRINFO_H
 #define LLVM_TARGET_MSP430INSTRINFO_H
 
-#include "llvm/Target/TargetInstrInfo.h"
 #include "MSP430RegisterInfo.h"
+#include "llvm/Target/TargetInstrInfo.h"
 
 #define GET_INSTRINFO_HEADER
 #include "MSP430GenInstrInfo.inc"