generic: ar8216: only set phy_ptr if packet mangling is used

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

git-svn-id: svn://svn.openwrt.org/openwrt/trunk@35541 3c298f89-4303-0410-b956-a3cf2f4a3e73
generic: ar8216: remove redundant phy address check

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

git-svn-id: svn://svn.openwrt.org/openwrt/trunk@35542 3c298f89-4303-0410-b956-a3cf2f4a3e73