configure: solaris and windowsaio fixups

Signed-off-by: Jens Axboe <axboe@kernel.dk>
diff --git a/fio.h b/fio.h
index 1ff384f..3a26335 100644
--- a/fio.h
+++ b/fio.h
@@ -40,7 +40,7 @@
 #include "stat.h"
 #include "flow.h"
 
-#ifdef FIO_HAVE_SOLARISAIO
+#ifdef CONFIG_SOLARISAIO
 #include <sys/asynch.h>
 #endif