staging: r8188eu: remove unused components in pwrctrl_priv

CONFIG_BT_COEXIST is never set. Remove two variables of
struct pwrctrl_priv that depend on CONFIG_BT_COEXIST,
they're not used.

Acked-by: Michael Straube <straube.linux@gmail.com>
Signed-off-by: Martin Kaiser <martin@kaiser.cx>
Link: https://lore.kernel.org/r/20211016172345.23114-2-martin@kaiser.cx


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