eudev: consider ID_NET_NAME_MAC as an interface name

eudev might not create names based on slot or path.

Upstream-Status: Backport [github.com/eudev-project/eudev/pull/274]

Signed-off-by: Joe Slater <joe.slater@windriver.com>

--- a/rules/80-net-name-slot.rules
+++ b/rules/80-net-name-slot.rules
@@ -10,5 +10,6 @@ ENV{net.ifnames}=="0", GOTO="net_name_sl
 NAME=="", ENV{ID_NET_NAME_ONBOARD}!="", NAME="$env{ID_NET_NAME_ONBOARD}"
 NAME=="", ENV{ID_NET_NAME_SLOT}!="", NAME="$env{ID_NET_NAME_SLOT}"
 NAME=="", ENV{ID_NET_NAME_PATH}!="", NAME="$env{ID_NET_NAME_PATH}"
+NAME=="", ENV{ID_NET_NAME_MAC}!="", NAME="$env{ID_NET_NAME_MAC}"
 
 LABEL="net_name_slot_end"