Cleanup, use new bitmap declarator instead of doing it by hand.

include/sound/ac97_codec.h

@@ -160,7 +160,7 @@ struct _snd_ac97 {
 	unsigned int rates_mic_adc;
 	unsigned int spdif_status;
 	unsigned short regs[0x80]; /* register cache */
-	unsigned long reg_accessed[0x80 / BITS_PER_LONG]; /* bit flags */
+	bitmap_member(reg_accessed, 0x80); /* bit flags */
 	union {			/* vendor specific code */
 		struct {
 			unsigned short unchained[3];	// 0 = C34, 1 = C79, 2 = C69