configure: solaris and windowsaio fixups

Signed-off-by: Jens Axboe <axboe@kernel.dk>
diff --git a/options.c b/options.c
index 16c7995..1009df3 100644
--- a/options.c
+++ b/options.c
@@ -1282,7 +1282,7 @@
 			    .help = "Solaris native asynchronous IO",
 			  },
 #endif
-#ifdef FIO_HAVE_WINDOWSAIO
+#ifdef CONFIG_WINDOWSAIO
 			  { .ival = "windowsaio",
 			    .help = "Windows native asynchronous IO"
 			  },