staging: brcm80211: remove osl handle from pkttotlen function

The function pkttotlen was part of osl function and as such was
called with struct osl_info parameter although not used within
the function. As part of remove the whole osl concept from the
drivers this parameter has been removed from the function
prototype.

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>