ar71xx: add USB workarounds for AR934x/QCA955x SoCs

Signed-off-by: Gabor Juhos <juhosg@openwrt.org>

git-svn-id: svn://svn.openwrt.org/openwrt@36787 3c298f89-4303-0410-b956-a3cf2f4a3e73
ar71xx: add kernel support for the TP-LINK Archer C7 board

Signed-off-by: Gabor Juhos <juhosg@openwrt.org>

git-svn-id: svn://svn.openwrt.org/openwrt@36788 3c298f89-4303-0410-b956-a3cf2f4a3e73
ar71xx: add user-space support for TP-LINK Archer C7 board

Signed-off-by: Gabor Juhos <juhosg@openwrt.org>

git-svn-id: svn://svn.openwrt.org/openwrt@36789 3c298f89-4303-0410-b956-a3cf2f4a3e73
ar71xx: add profile and build image for the Archer C7 board

Signed-off-by: Gabor Juhos <juhosg@openwrt.org>

git-svn-id: svn://svn.openwrt.org/openwrt@36790 3c298f89-4303-0410-b956-a3cf2f4a3e73