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

mixart: 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/pci/mixart/mixart.c

@@ -1109,13 +1109,13 @@ static long long snd_mixart_BA0_llseek(struct snd_info_entry *entry,
 	offset = offset & ~3; /* 4 bytes aligned */
 
 	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 = MIXART_BA0_SIZE + offset;
 		break;
 	default:
@@ -1135,13 +1135,13 @@ static long long snd_mixart_BA1_llseek(struct snd_info_entry *entry,
 	offset = offset & ~3; /* 4 bytes aligned */
 
 	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 = MIXART_BA1_SIZE + offset;
 		break;
 	default: