[PATCH] [mips] Remove trivial header files of various passes. NFC.

[Eric Christopher]

In general this patch should be split up across things that sound like a good incremental fixup. It's a lot of stuff right now. I.e. you could probably split it up on a pass by pass basis and then the target machine bits as a final one.

One nit I saw inline.

-eric


================
Comment at: lib/Target/Mips/Mips16HardFloat.cpp:16
@@ -20,1 +15,3 @@
 #include <string>
+#include "llvm/Support/Debug.h"
+#include "llvm/Pass.h"
----------------
Standard headers go last.

http://reviews.llvm.org/D7838

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