drivers: sensor: temp_nrf5: fix sensor type
drivers: sensor: temp_nrf5: fix sensor type

The sensor channel type for the nRF TEMP peripheral is incorrectly set
to SENSOR_CHAN_AMBIENT_TEMP. This peripheral measures die temperature,
not ambient temperature.

Fix the sensor channel.

Signed-off-by: Marti Bolivar <fd5da480b758a78208111e6ae5c6806e1f887137@opensourcefoundries.com>

nashif/zephyr,zephyriot/zephyr,zephyriot/zephyr,mbolivar/zephyr,zephyriot/zephyr,Vudentz/zephyr,galak/zephyr,kraj/zephyr,finikorg/zephyr,kraj/zephyr,mbolivar/zephyr,finikorg/zephyr,kraj/zephyr,nashif/zephyr,explora26/zephyr,nashif/zephyr,finikorg/zephyr,mbolivar/zephyr,nashif/zephyr,zephyrproject-rtos/zephyr,galak/zephyr,punitvara/zephyr,GiulianoFranchetto/zephyr,Vudentz/zephyr,galak/zephyr,finikorg/zephyr,GiulianoFranchetto/zephyr,galak/zephyr,zephyrproject-rtos/zephyr,explora26/zephyr,galak/zephyr,punitvara/zephyr,zephyrproject-rtos/zephyr,Vudentz/zephyr,explora26/zephyr,GiulianoFranchetto/zephyr,kraj/zephyr,ldts/zephyr,GiulianoFranchetto/zephyr,zephyriot/zephyr,ldts/zephyr,zephyriot/zephyr,explora26/zephyr,zephyrproject-rtos/zephyr,punitvara/zephyr,ldts/zephyr,nashif/zephyr,finikorg/zephyr,GiulianoFranchetto/zephyr,mbolivar/zephyr,Vudentz/zephyr,Vudentz/zephyr,mbolivar/zephyr,punitvara/zephyr,punitvara/zephyr,Vudentz/zephyr,ldts/zephyr,zephyrproject-rtos/zephyr,ldts/zephyr,kraj/zephyr,explora26/zephyr