ALSA: rme*: Use snd_pcm_format_t

Fix sparse warnings below by using snd_pcm_format_t properly:
   sound/pci/rme32.c:682:60: sparse: incorrect type in argument 2 (different base types)
  sound/pci/rme96.c:1006:69: sparse: incorrect type in argument 2 (different base types)
   .....

Signed-off-by: Takashi Iwai <tiwai@suse.de>
diff --git a/sound/pci/rme32.c b/sound/pci/rme32.c
index 6c60dcd..1a7affa 100644
--- a/sound/pci/rme32.c
+++ b/sound/pci/rme32.c
@@ -632,7 +632,7 @@
 	}
 }
 
-static int snd_rme32_setformat(struct rme32 * rme32, int format)
+static int snd_rme32_setformat(struct rme32 *rme32, snd_pcm_format_t format)
 {
 	switch (format) {
 	case SNDRV_PCM_FORMAT_S16_LE: