staging: brcm80211: remove usage of struct osl_info to access device

For accessing the PCI or SDIO device in the driver the device is stored
in a separate structure osl_info. To get rid of the osl concept the use
of this device pointer attribute is removed from the drivers.

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>