ALSA: 6fire: use the kernel's built-in bit reverse table

Signed-off-by: Daniel Mack <zonque@gmail.com>
Cc: Torsten Schenk <torsten.schenk@zoho.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>

sound/usb/Kconfig

@@ -101,6 +101,7 @@ config SND_USB_US122L
 config SND_USB_6FIRE
         tristate "TerraTec DMX 6Fire USB"
         select FW_LOADER
+        select BITREVERSE
         select SND_RAWMIDI
         select SND_PCM
         help