usb: gadget: f_uac2: clean up some inconsistent indenting

There are bunch of statements where the indentation is not correct,
clean these up.

Signed-off-by: Colin Ian King <colin.king@canonical.com>
Link: https://lore.kernel.org/r/20210902224758.57600-1-colin.king@canonical.com


Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>