Import gx, PadClamp, rest of mtx, TRK 2.6 and MSL (#525)

* Match mtx and Padclamp.c

* Match the rest of GX

* Import TRK 2.6

* Import MSL headers and files

* Merge some MSL headers into ours

include/TRK_MINNOW_DOLPHIN/ppc/Generic/flush_cache.h

@@ -0,0 +1,16 @@
+#ifndef PPC_GENERIC_FLUSH_CACHE_H
+#define PPC_GENERIC_FLUSH_CACHE_H
+
+#include <dolphin/types.h>
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+void TRK_flush_cache(void* param_1, int param_2);
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* PPC_GENERIC_FLUSH_CACHE_H */