The PCM format type is with __bitwise, and it can't be converted from
integer implicitly.  Instead of an ugly cast, declare the function
argument of snd_wss_get_format() with the proper snd_pcm_format_t
type.
This fixes the sparse warnings like:
  sound/isa/wss/wss_lib.c:551:14: warning: restricted snd_pcm_format_t degrades to integer
Signed-off-by: Takashi Iwai <tiwai@suse.de>
 }
 
 static unsigned char snd_wss_get_format(struct snd_wss *chip,
-                                       int format,
+                                       snd_pcm_format_t format,
                                        int channels)
 {
        unsigned char rformat;