altair,hso,samsung: setup send-delay=0 for probing

The Altair, Option HSO and Samsung plugins all use the send-delay=0
setting once the modem object has been created. For consistency, use
the same setting during port probing.

plugins/option/mm-plugin-hso.c

@@ -186,6 +186,7 @@ mm_plugin_create (void)
                       MM_PLUGIN_ALLOWED_AT,         TRUE,
                       MM_PLUGIN_ALLOWED_QCDM,       TRUE,
                       MM_PLUGIN_CUSTOM_INIT,        &custom_init,
+                      MM_PLUGIN_SEND_DELAY,         0,
                       NULL));
 }