staging: r8188eu: to_fr_ds cannot be 3 here

Remove two unnecessary ternary operators in validate_recv_data_frame.
pattrib->to_fr_ds cannot be 3 in these places. If it was 3, we'd already
have returned an error to the caller.

Signed-off-by: Martin Kaiser <martin@kaiser.cx>
Link: https://lore.kernel.org/r/20220403165438.357728-6-martin@kaiser.cx


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