ALSA: ice1724 - make some bitfields unsigned

This is a clean up and doesn't change the behavior.

Bit fields should always be unsigned.  Otherwise pm_suspend_enabled will
be -1 when you want it to be 1.  The other bad thing is that the sparse
checker will complain 36 times if they aren't unsigned.

The other bitfields in that struct are unsigned already.
Signed-off-by: NDan Carpenter <error27@gmail.com>
Signed-off-by: NTakashi Iwai <tiwai@suse.de>

sound/pci/ice1712/ice1712.h

@@ -382,8 +382,8 @@ struct snd_ice1712 {
 #ifdef CONFIG_PM
 	int (*pm_suspend)(struct snd_ice1712 *);
 	int (*pm_resume)(struct snd_ice1712 *);
-	int pm_suspend_enabled:1;
-	int pm_saved_is_spdif_master:1;
+	unsigned int pm_suspend_enabled:1;
+	unsigned int pm_saved_is_spdif_master:1;
 	unsigned int pm_saved_spdif_ctrl;
 	unsigned char pm_saved_spdif_cfg;
 	unsigned int pm_saved_route;