TTY/ASoC: Rename N_AMSDELTA line discipline to N_V253

The patch changes the line discipline name registered in include/linux/tty.h
and updates the ams-delta machine driver to use it.
Signed-off-by: Janusz Krzysztofik <jkrzyszt@tis.icnet.pl>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>

include/linux/tty.h

@@ -47,7 +47,7 @@
 #define N_SLCAN		17	/* Serial / USB serial CAN Adaptors */
 #define N_PPS		18	/* Pulse per Second */
 
-#define N_AMSDELTA	19	/* codec control over modem, board specific */
+#define N_V253		19	/* Codec control over voice modem */
 
 /*
  * This character is the same as _POSIX_VDISABLE: it cannot be used as

sound/soc/omap/ams-delta.c

@@ -500,7 +500,7 @@ static int ams_delta_cx20442_init(struct snd_soc_codec *codec)
 	}
 
 	/* Register optional line discipline for over the modem control */
-	ret = tty_register_ldisc(N_AMSDELTA, &cx81801_ops);
+	ret = tty_register_ldisc(N_V253, &cx81801_ops);
 	if (ret) {
 		dev_warn(card->dev,
 				"Failed to register line discipline, "
@@ -625,9 +625,9 @@ static void __exit ams_delta_module_exit(void)
 		}
 	}
 
-	if (tty_unregister_ldisc(N_AMSDELTA) != 0)
+	if (tty_unregister_ldisc(N_V253) != 0)
 		dev_warn(&ams_delta_audio_platform_device->dev,
-			"failed to unregister AMSDELTA line discipline\n");
+			"failed to unregister V253 line discipline\n");
 
 	snd_soc_jack_free_gpios(&ams_delta_hook_switch,
 			ARRAY_SIZE(ams_delta_hook_switch_gpios),