ALSA: usb: Use BIT() for bit values

Instead of the explicit "1 << x", use BIT() macro for one bit values.
This will improve the readability and also avoids the possible bad
value for 31bit shift.

Link: https://patch.msgid.link/20240715123646.26679-1-tiwai@suse.de


Signed-off-by: Takashi Iwai <tiwai@suse.de>