ALSA: fm801: propagate TUNER_ONLY bit when autodetected

commit dbec6719 upstream.

The commit d7ba858a (ALSA: fm801: implement TEA575x tuner autodetection)
brings autodetection to the driver. However the autodetection algorithm misses
the TUNER_ONLY bit if it is supplied by the user.

Thus, user gets weird messages and no card registered.

 snd_fm801 0000:0d:01.0: detected TEA575x radio type SF64-PCR
 snd_fm801 0000:0d:01.0: AC'97 interface is busy (1)
 snd_fm801 0000:0d:01.0: AC'97 interface is busy (1)
...
 snd_fm801 0000:0d:01.0: AC'97 0 does not respond - RESET
 snd_fm801 0000:0d:01.0: AC'97 interface is busy (1)
 snd_fm801 0000:0d:01.0: AC'97 interface is busy (1)
 snd_fm801 0000:0d:01.0: AC'97 0 access is not valid [0x0], removing mixer.
 snd_fm801: probe of 0000:0d:01.0 failed with error -5

Do a copy of TUNER_ONLY bit to be applied after autodetection is done.

Fixes: d7ba858a (ALSA: fm801: implement TEA575x tuner autodetection)
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Cc: Ondrej Zary <linux@rainbow-software.org>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Luis Henriques <luis.henriques@canonical.com>

sound/pci/fm801.c

@@ -1286,6 +1286,8 @@ static int snd_fm801_create(struct snd_card *card,
 			return -ENODEV;
 		}
 	} else if ((tea575x_tuner & TUNER_TYPE_MASK) == 0) {
+		unsigned int tuner_only = tea575x_tuner & TUNER_ONLY;
+
 		/* autodetect tuner connection */
 		for (tea575x_tuner = 1; tea575x_tuner <= 3; tea575x_tuner++) {
 			chip->tea575x_tuner = tea575x_tuner;
@@ -1300,6 +1302,8 @@ static int snd_fm801_create(struct snd_card *card,
 			dev_err(card->dev, "TEA575x radio not found\n");
 			chip->tea575x_tuner = TUNER_DISABLED;
 		}
+
+		chip->tea575x_tuner |= tuner_only;
 	}
 	if (!(chip->tea575x_tuner & TUNER_DISABLED)) {
 		strlcpy(chip->tea.card, get_tea575x_gpio(chip)->name,