hw/net: e1000: Remove the logic of padding short frames in the receive path

Now that we have implemented unified short frames padding in the
QEMU networking codes, remove the same logic in the NIC codes.

This actually reverts commit 78aeb23eded2d0b765bf9145c71f80025b568acd.

Signed-off-by: Bin Meng <bmeng@tinylab.org>
Signed-off-by: Jason Wang <jasowang@redhat.com>
1 file changed