staging: brcm80211: move functions only used by brcmsmac out of utils

The functions gitvar() and getintvar() are only used by brcmsmac, so move them
out of the bcmutils.c file, which is shared by both brcmsmac and brcmfmac.

Cc: devel@linuxdriverproject.org
Cc: linux-wireless@vger.kernel.org
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>