staging: r8188eu: rename rtw_os_xmit_schedule()

staging: r8188eu: rename rtw_os_xmit_schedule()

The function rtw_os_xmit_schedule() was moved from the os_dep
directory. It looks like the driver was originaly written to support
different operating systems. Obviously we do not need an extra 'os'
in the function name that indicates that the function is operating
system specific. Rename it to rtw_xmit_schedule().

Tested-by: Philipp Hortmann <philipp.g.hortmann@gmail.com> # Edimax N150
Signed-off-by: Michael Straube <straube.linux@gmail.com>
Link: https://lore.kernel.org/r/20220820181623.12497-4-straube.linux@gmail.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>