staging: brcm80211: rename functions and variables in dhd_common.c

The naming convention of the drivers is to be made consistent. This
commit fixes the function in dhd_common.c and use the new names from
the calling code.

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