i2c_mcp9808 read ambient temperature from an mcp9808 sensor connected
on an I2c bus and print it to standard output.

Example config of a component using the imx8q_evk_i2c_drv driver:

!<start name="i2c_mcp9808">
!
!  <resource name="RAM" quantum="1M"/>
!
!  <route>
!    <service name="I2c"> <child name="imx8q_evk_i2c_drv" label="MCP_9808"/> </service>
!    <any-service> <parent/> </any-service>
!  </route>
!
!</start>
