arm64: dts: ls208xa: add power monitor chip node

Ina220 chip was used on ls208xardb platform to monitor power
comsumption. So add ina220 chip node in dts to enable power
consumption monitor feature.

Signed-off-by: Tang Yuantian <andy.tang@nxp.com>
Signed-off-by: Shawn Guo <shawnguo@kernel.org>