thermal: of-thermal: Appease the kernel-doc deity

Replace a comment starting with /** by simply /* to avoid having
it interpreted as a kernel-doc comment.

Fixes the following warning when compile with make W=1:
linux.git/drivers/thermal/of-thermal.c:761: warning: cannot understand function prototype: 'const char *trip_types[] = '
Signed-off-by: Amit Kucheria <amit.kucheria@linaro.org>
Reviewed-by: Viresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
Link: https://lore.kernel.org/r/dc742789bf4b3c8207b01c7946f2b401350536a7.1574242756.git.amit.kucheria@linaro.org

drivers/thermal/of-thermal.c

@@ -754,7 +754,7 @@ static int thermal_of_populate_bind_params(struct device_node *np,
 	return ret;
 }
 
-/**
+/*
  * It maps 'enum thermal_trip_type' found in include/linux/thermal.h
  * into the device tree binding of 'trip', property type.
  */