thermal: Add thermal driver for i.MX8M

The driver is ported form Linux Kernel and support driver model.
Users need to provide the tmu node and sensors nodes in DTB.

Signed-off-by: Ye Li <ye.li@nxp.com>
Signed-off-by: Peng Fan <peng.fan@nxp.com>
diff --git a/drivers/thermal/Kconfig b/drivers/thermal/Kconfig
index bdf8dc6..97d4163 100644
--- a/drivers/thermal/Kconfig
+++ b/drivers/thermal/Kconfig
@@ -26,6 +26,15 @@
 	  boot is hold to the cool device to throttle CPUs when the passive
 	  trip is crossed
 
+config IMX_TMU
+        bool "Thermal Management Unit driver for NXP i.MX8M"
+        depends on ARCH_IMX8M
+        help
+          Support for Temperature sensors on NXP i.MX8M.
+          It supports one critical trip point and one passive trip point.
+	  The boot is hold to the cool device to throttle CPUs when the
+	  passive trip is crossed
+
 config TI_DRA7_THERMAL
         bool "Temperature sensor driver for TI dra7xx SOCs"
         help