ARM: dts: imx7d-sdb: Add sht11 Click Board support

The imx7d-sdb has a mickro bus connector that can be connected to a
Sensirion SHT11 click board (temperature and humidity sensor):

https://shop.mikroe.com/click/sensors/sht1x



Add a new device tree file to describe such hardware.

Signed-off-by: Marco Franchi <marco.franchi@nxp.com>
Signed-off-by: Shawn Guo <shawnguo@kernel.org>