dmac: fix name mangling

Author: diamant3

src/dmac/pspdmac.h

@@ -8,8 +8,15 @@
  * Copyright (c) 2016 173210 <[email protected]>
  */
 
+#ifndef __DMAC_H__
+#define __DMAC_H__
+
 #include <psptypes.h>
 
+#ifdef __cplusplus
+extern "C" {
+#endif
+
 /**
  * Copy data in memory using DMAC
  *
@@ -22,3 +29,9 @@
 int sceDmacMemcpy(void *dst, const void *src, SceSize n);
 
 int sceDmacTryMemcpy(void *dst, const void *src, SceSize n);
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif