kernel: keep dropped stats in fq_codel

Signed-off-by: Felix Fietkau <nbd@openwrt.org>

git-svn-id: svn://svn.openwrt.org/openwrt@36303 3c298f89-4303-0410-b956-a3cf2f4a3e73
kernel: switch default qdisc from pfifo_fast to fq_codel and remove pfifo_fast

Signed-off-by: Felix Fietkau <nbd@openwrt.org>

git-svn-id: svn://svn.openwrt.org/openwrt@36304 3c298f89-4303-0410-b956-a3cf2f4a3e73
mac80211: revert the queue length to the default (reduction obsoleted by the use of fq_codel)

Signed-off-by: Felix Fietkau <nbd@openwrt.org>

git-svn-id: svn://svn.openwrt.org/openwrt@36305 3c298f89-4303-0410-b956-a3cf2f4a3e73