staging: brcm80211: remove struct osl_info parameter from wlc_alloc

The functions within wlc_alloc had parameter of struct osl_info type
but it was never used. As part of osl concept removal this parameter
has been removed from the function prototypes.

Reviewed-by: Roland Vossen <rvossen@broadcom.com>
Reviewed-by: Brett Rudley <brudley@broadcom.com>
Signed-off-by: Arend van Spriel <arend@broadcom.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>