net: bcmgenet: Add a check for oversized packets

net: bcmgenet: Add a check for oversized packets

[ Upstream commit c34009f98b64271c5ef905aa4e8f6ee0cf5c1efc ]

Occasionnaly we may get oversized packets from the hardware which
exceed the nomimal 2KiB buffer size we allocate SKBs with. Add an early
check which drops the packet to avoid invoking skb_over_panic() and move
on to processing the next packet.

Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Sasha Levin <sashal@kernel.org>