staging: brcm80211: remove support functions for older chipsets from …

…bcmsrom

The source file contained functions for both older and current chipsets
but the brcmsmac driver does not support the older chipsets so those
functions are removed.

Reviewed-by: Henry Ptasinski <henryp@broadcom.com>
Signed-off-by: Arend van Spriel <arend@broadcom.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>