[libretro] fix implicit-function-declaration
#include "pccore.h"
#include "iocore.h"
#include "sxsi.h"
+#include "sysmng.h"
#if defined(SUPPORT_IDEIO)
#include "ideio.h"
#endif
+#if !defined(_MSC_VER)
#include <sys/time.h>
+#endif
_SXSIDEV sxsi_dev[SASIHDD_MAX + SCSIHDD_MAX];
