base-files: firstboot: only ask for confirmation on TTY

Also allow '-y' to force the reset.

git-svn-id: svn://svn.openwrt.org/openwrt/trunk@36133 3c298f89-4303-0410-b956-a3cf2f4a3e73
mac80211: backport some upstream mwl8k fixes

git-svn-id: svn://svn.openwrt.org/openwrt/trunk@36134 3c298f89-4303-0410-b956-a3cf2f4a3e73