staging: r8188eu: Remove include/rtw_qos.h

This header file merely defines a single struct. Move that definition
to the header file that uses it, and delete rtw_qos.h.

Signed-off-by: Larry Finger <Larry.Finger@lwfinger.net>
Link: https://lore.kernel.org/r/20210729170930.23171-4-Larry.Finger@lwfinger.net


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