arm64: dts: renesas: condor: add I2C0 support

Define the Condor board dependent part of the I2C0 device node.

The I2C0 bus is populated by 2 ON Semiconductor PCA9654 I/O expanders
and Analog Devices  ADV7511W HDMI transmitter (but we're only describing
the former chips now).

Signed-off-by: Sergei Shtylyov <sergei.shtylyov@cogentembedded.com>
Signed-off-by: Simon Horman <horms+renesas@verge.net.au>