dt-bindings: i3c: cdns: Use correct cells for I2C device

I2C device reg should be "reg = <0x52 0x0 0x10>;"

Fixes: e29d0d9c ("dt-bindings: i3c: Document Cadence I3C master bindings")
Signed-off-by: Qii Wang <qii.wang@mediatek.com>
Signed-off-by: Boris Brezillon <boris.brezillon@collabora.com>