thermal: ti-bandgap: Add support for temperature sensor

The dra7xx series of SOCs contain a temperature sensor and an
associated analog-to-digital converter (ADC) which produces
an output which is proportional to the SOC temperature.
Add support for this temperature sensor.

Signed-off-by: Faiz Abbas <faiz_abbas@ti.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
diff --git a/drivers/thermal/Kconfig b/drivers/thermal/Kconfig
index 886f5fa..a71b9be 100644
--- a/drivers/thermal/Kconfig
+++ b/drivers/thermal/Kconfig
@@ -17,4 +17,10 @@
           cpufreq is used as the cooling device to throttle CPUs when the
           passive trip is crossed.
 
+config TI_DRA7_THERMAL
+        bool "Temperature sensor driver for TI dra7xx SOCs"
+        help
+	 Enable thermal support for for the Texas Instruments DRA752 SoC family.
+	 The driver supports reading CPU temperature.
+
 endif # if DM_THERMAL