generic: ar8216: add ar8xxx_create{,mii} helpers

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

git-svn-id: svn://svn.openwrt.org/openwrt/trunk@35543 3c298f89-4303-0410-b956-a3cf2f4a3e73
generic: ar8216: add ar8xxx_free helper

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

git-svn-id: svn://svn.openwrt.org/openwrt/trunk@35544 3c298f89-4303-0410-b956-a3cf2f4a3e73
generic: ar8216: free mib counters from ar8xxx_free

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

git-svn-id: svn://svn.openwrt.org/openwrt/trunk@35545 3c298f89-4303-0410-b956-a3cf2f4a3e73
generic: ar8216: rename ar8xxx_mib_cleanup to ar8xxx_mib_stop

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

git-svn-id: svn://svn.openwrt.org/openwrt/trunk@35546 3c298f89-4303-0410-b956-a3cf2f4a3e73