staging: wilc1000: avoid use of 'hif_deinit_lock' static variable

Avoid use of static variable 'hif_deinit_lock' and move it as part of
wilc struct.

Signed-off-by: Ajay Singh <ajay.kathat@microchip.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>