ARM: dts: vf610-zii-dev-c: Fix switch EEPROM size

The two Ethernet switches have an AT24C512 each. This is a 64K device,
not 512 bytes as currently listed in the device tree.

Reported-by: Chris Healy <cphealy@gmail.com>
Signed-off-by: Andrew Lunn <andrew@lunn.ch>
Reviewed-by: Chris Healy <cphealy@gmail.com>
Reviewed-by: Fabio Estevam <fabio.estevam@nxp.com>
Signed-off-by: Shawn Guo <shawnguo@kernel.org>