staging: brcm80211: remove chip simulation specific code

The driver contained several code paths specific to running the
driver against a simulated chip. This is not needed and removed.

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