ALSA: azt3328: Replace with __packed attribute

Replace the old __attribute__((packed)) with the new __packed.
Only cleanup, no functional changes.

Link: https://lore.kernel.org/r/20231025132314.5878-5-tiwai@suse.deSigned-off-by: Takashi Iwai <tiwai@suse.de>

sound/pci/azt3328.c

@@ -1383,7 +1383,7 @@ snd_azf3328_codec_setdmaa(struct snd_azf3328 *chip,
 			u32 dma_start_1;
 			u32 dma_start_2;
 			u32 dma_lengths;
-		} __attribute__((packed)) setup_io;
+		} __packed setup_io;
 
 		area_length = buffer_bytes/2;