imx8mm_evk_defconfig: Select CONFIG_IMX_TMU

Select the i.MX8MM thermal driver as it is useful for displaying
the CPU temperature and its grading:

CPU:   Commercial temperature grade (0C to 95C) at 38C

It also prevents booting when the temperature is above the alert
point.

Signed-off-by: Fabio Estevam <festevam@denx.de>
1 file changed