netifd: add support for promisc and GRE tos option

git-svn-id: svn://svn.openwrt.org/openwrt/trunk@42699 3c298f89-4303-0410-b956-a3cf2f4a3e73
GRE: Tos support

Tos support is added as a generic grev4/grev6 parameter which can have the following values :
     -inherit (outer header inherits the tos value of the inner header)
     -hex value

Signed-off-by: Hans Dedecker <dedeckeh@gmail.com>

git-svn-id: svn://svn.openwrt.org/openwrt/trunk@42700 3c298f89-4303-0410-b956-a3cf2f4a3e73
ath9k: add back missing fixes from the last version

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

git-svn-id: svn://svn.openwrt.org/openwrt/trunk@42701 3c298f89-4303-0410-b956-a3cf2f4a3e73