Latest drivers version requires phy-mode to be set. Otherwise we will
use "NA" mode and the switch driver will invalidate this port mode.
Fixes: 65ac79e18120 ("net: dsa: microchip: add the phylink get_caps")
Signed-off-by: Oleksij Rempel <o.rempel@pengutronix.de>
Link: https://lore.kernel.org/r/20220610081621.584393-1-o.rempel@pengutronix.de
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
 
                        port@0 {
                                reg = <0>;
                                label = "lan1";
+                               phy-mode = "internal";
                        };
 
                        port@1 {
                                reg = <1>;
                                label = "lan2";
+                               phy-mode = "internal";
                        };
 
                        port@2 {
                                reg = <2>;
                                label = "lan3";
+                               phy-mode = "internal";
                        };
 
                        port@3 {
                                reg = <3>;
                                label = "lan4";
+                               phy-mode = "internal";
                        };
 
                        port@4 {
                                reg = <4>;
                                label = "lan5";
+                               phy-mode = "internal";
                        };
 
                        port@5 {