docs: ABI: fixed formatting in configfs-usb-gadget-uac2

Added missing tab, line breaks.

Fixes: e3088ebc ("docs: ABI: added missing num_requests param to UAC2")
Reported-by: Stephen Rothwell <sfr@canb.auug.org.au>
Signed-off-by: Pavel Hofman <pavel.hofman@ivitera.com>
Link: https://lore.kernel.org/r/20220108105608.10726-1-pavel.hofman@ivitera.com


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