r8169: Fix card drop incoming VLAN tagged MTU byte large jumbo frames

r8169 card drop incoming VLAN tagged MTU byte large jumbo frames

It looks to compare current and maximal packet sizes hardware use
'<' operator, not '<='.

Bug introduced by commit fdd7b4c3


("r8169: fix crash when large packets are received")

Signed-off-by: Raimonds Cicans <ray@apollo.lv>
Signed-off-by: David S. Miller <davem@davemloft.net>