[ALSA] Add more fallbacks to OSS PHONEOUT mixer map

Added more fallbacks to OSS PHONEOUT mixer mapping.  This corresponds
to the speaker output in general, so now "Mono" and "Speaker" are
assigned.
Signed-off-by: NTakashi Iwai <tiwai@suse.de>

sound/core/oss/mixer_oss.c

@@ -1257,6 +1257,8 @@ static void snd_mixer_oss_build(struct snd_mixer_oss *mixer)
 		{ SOUND_MIXER_DIGITAL3,	"Digital",		2 },
 		{ SOUND_MIXER_PHONEIN,	"Phone",		0 },
 		{ SOUND_MIXER_PHONEOUT,	"Master Mono",		0 },
+		{ SOUND_MIXER_PHONEOUT,	"Speaker",		0 }, /*fallback*/
+		{ SOUND_MIXER_PHONEOUT,	"Mono",			0 }, /*fallback*/
 		{ SOUND_MIXER_PHONEOUT,	"Phone",		0 }, /* fallback */
 		{ SOUND_MIXER_VIDEO,	"Video",		0 },
 		{ SOUND_MIXER_RADIO,	"Radio",		0 },