staging: r8188eu: clean up qos_option setting

staging: r8188eu: clean up qos_option setting

The qos_option variable in function rtw_make_wlanhdr should be a boolean
as it's set to true or false. We can directly set it to
pqospriv->qos_option instead of using a default value and if statements.

Signed-off-by: Martin Kaiser <martin@kaiser.cx>
Tested-by: Philipp Hortmann <philipp.g.hortmann@gmail.com> # Edimax N150
Link: https://lore.kernel.org/r/20221230180646.91008-12-martin@kaiser.cx
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>