ARM: dts: at91: sama5d2_xplained: Add aliases for the dedicated I2C IPs

The sama5d2 SoC has two dedicated I2C IPs that are enabled on
sama5d2_xplained. Add alias for the i2c devices to not rely on
probe order for the i2c device numbering.

Signed-off-by: Tudor Ambarus <tudor.ambarus@microchip.com>
Link: https://lore.kernel.org/r/20200518114802.253660-1-tudor.ambarus@microchip.com


Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>