[ALSA] opl4: Use SEEK_{SET,CUR,END} instead of hardcoded values

opl4: Use SEEK_{SET,CUR,END} instead of hardcoded values
Signed-off-by: NJosef 'Jeff' Sipek <jeffpc@josefsipek.net>
Signed-off-by: NAndrew Morton <akpm@osdl.org>
Signed-off-by: NTakashi Iwai <tiwai@suse.de>
Signed-off-by: NJaroslav Kysela <perex@suse.cz>

sound/drivers/opl4/opl4_proc.c

@@ -105,13 +105,13 @@ static long long snd_opl4_mem_proc_llseek(struct snd_info_entry *entry, void *fi
 					  struct file *file, long long offset, int orig)
 {
 	switch (orig) {
-	case 0: /* SEEK_SET */
+	case SEEK_SET:
 		file->f_pos = offset;
 		break;
-	case 1: /* SEEK_CUR */
+	case SEEK_CUR:
 		file->f_pos += offset;
 		break;
-	case 2: /* SEEK_END, offset is negative */
+	case SEEK_END: /* offset is negative */
 		file->f_pos = entry->size + offset;
 		break;
 	default: