UPSTREAM: docs: ABI: fixed req_number desc in UAC1

Fixed wording of the req_number description in UAC1 docs.

Signed-off-by: Pavel Hofman <pavel.hofman@ivitera.com>
Link: https://lore.kernel.org/r/20211225130929.205629-2-pavel.hofman@ivitera.com


Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Bug: 235196743
(cherry picked from commit a8cf0516)
Change-Id: I9815823f67ea086a8e9a3216e988cdd7c7b3de5a
Signed-off-by: Luiz Matheus <luizmmat@motorola.com>