staging: wilc1000: remove p2p related static variables to wilc_vif struct

Avoid use of static variable and move them as part of private
data(wilc_priv) struct.

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