ARM: dts: vf610-zii-dev: add EEPROM entry to Rev C

The ZII Dev Rev C board has EEPROMs hanging the 88E6390 Ethernet switch
chips. Add an "eeprom-length" property to allow access from ethtool.
Signed-off-by: Vivien Didelot <vivien.didelot@savoirfairelinux.com>
Signed-off-by: Shawn Guo <shawnguo@kernel.org>

arch/arm/boot/dts/vf610-zii-dev-rev-c.dts

@@ -71,6 +71,7 @@ switch0: switch@0 {
 				#size-cells = <0>;
 				reg = <0>;
 				dsa,member = <0 0>;
+				eeprom-length = <512>;
 
 				ports {
 					#address-cells = <1>;
@@ -128,6 +129,7 @@ switch1: switch@0 {
 				#size-cells = <0>;
 				reg = <0>;
 				dsa,member = <0 1>;
+				eeprom-length = <512>;
 
 				ports {
 					#address-cells = <1>;