[ALSA] add the ESS1879 pnpbios ID to the es18xx driver

As reported by Troy Heidner, the 'Gateway Solo 5150' laptop (for one) has an
onboard ESS1879 that identifies itself through PNPBIOS as just that. He also
confirmed that other than not knowing about it, snd-es18xx drives the chip
fine, so this adds the ID to the driver.

Signed-off-by: Rene Herman <rene.herman@gmail.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Jaroslav Kysela <perex@suse.cz>

sound/isa/es18xx.c

@@ -2028,6 +2028,7 @@ static int pnpc_registered;
 
 static struct pnp_device_id snd_audiodrive_pnpbiosids[] = {
 	{ .id = "ESS1869" },
+	{ .id = "ESS1879" },
 	{ .id = "" }		/* end */
 };