staging: r8188eu: remove HAL_*_ENABLE defines

HAL_(MAC|BB|RF)_ENABLE are always set. Remove the defines and the
checks where they are used.

Signed-off-by: Martin Kaiser <martin@kaiser.cx>
Link: https://lore.kernel.org/r/20220108124959.313215-12-martin@kaiser.cx


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