net: stmmac: correct clocks enabled in stmmac_vlan_rx_kill_vid()

This should be a mistake to fix conflicts when removing RFC tag to
repost the patch.

Fixes: 5ec55823 ("net: stmmac: add clocks management for gmac driver")
Signed-off-by: Joakim Zhang <qiangqing.zhang@nxp.com>
Signed-off-by: David S. Miller <davem@davemloft.net>