staging: r8188eu: remove unused fields from struct pwrctrl_priv

There are some unused fields in the pwrctrl_priv structure.
Remove them.

Signed-off-by: Michael Straube <straube.linux@gmail.com>
Link: https://lore.kernel.org/r/20220404082142.4639-2-straube.linux@gmail.com


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