net: ti: icssg-prueth: Add VID 1 to vlan table in switch mode.

commit 73894c554e260a4fa96bf66bed31c9416919215c from
git://git.ti.com/ti-linux-kernel/ti-linux-kernel.git

In order for the packets to be received at host port, switch firmware
requires VLAN ID = 1 to be present in the VLAN table.

Without this, ping to host port doesn't work in switch mode.

Fixes: 2623e9589873 ("net: ethernet: ti: icssg_prueth: Add support for ICSSG switch firmware on AM654 PG2.0 and AM64 EVM")
Signed-off-by: MD Danish Anwar <danishanwar@ti.com>
Reviewed-by: Ravi Gunasekaran <r-gunasekaran@ti.com>
Signed-off-by: Xulin Sun <xulin.sun@windriver.com>