board: gateworks: venice: add print for GPY111 PHY name

Due to supply chain issues Venice boards use either a DP83867 or a
GPY111 RGMII PHY. We already print an identifier for the DP83867 so add
one for the GPY111 to better identify what PHY is on a board:

Example:
 Net:   GPY111 eth0: ethernet@30be0000 [PRIME]
 Net:   DP83867 eth0: ethernet@30be0000 [PRIME]

Signed-off-by: Tim Harvey <tharvey@gateworks.com>