staging: brcm80211: remove SDIO related definitions from nicpci.h

The header file nicpci.h is now only used by brcmsmac driver, which
does not support SDIO. The conditional defintions have been removed
from the header file.

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>