v253_init: eliminate pointer to string

There is no need to have an extra pointer to a string (v253_init).
Convert it to an array.

Cc: Liam Girdwood <lgirdwood@gmail.com>
Cc: Mark Brown <broonie@kernel.org>
Cc: Jaroslav Kysela <perex@perex.cz>
Cc: Takashi Iwai <tiwai@suse.com>
Cc: alsa-devel@alsa-project.org
Signed-off-by: Jiri Slaby <jslaby@suse.cz>
Link: https://lore.kernel.org/r/20210722115141.516-2-jslaby@suse.cz
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

sound/soc/codecs/cx20442.c

@@ -206,7 +206,7 @@ static int cx20442_write(struct snd_soc_component *component, unsigned int reg,
  */
 
 /* Modem init: echo off, digital speaker off, quiet off, voice mode */
-static const char *v253_init = "ate0m0q0+fclass=8\r";
+static const char v253_init[] = "ate0m0q0+fclass=8\r";
 
 /* Line discipline .open() */
 static int v253_open(struct tty_struct *tty)