atheros: Fix glibc 'invalid pointer' error when WPA_TRACE is enabled

Signed-off-by: Baruch Siach <baruch@tkos.co.il>

src/drivers/driver_atheros.c

@@ -1116,7 +1116,7 @@ atheros_get_we_version(struct atheros_driver_data *drv)
 		drv->we_version = range->we_version_compiled;
 	}
 
-	free(range);
+	os_free(range);
 	return 0;
 }