thermal: cpuidle_cooling: Adjust includes to remove of_device.h

Now that of_cpu_device_node_get() is defined in of.h, of_device.h is just
implicitly including other includes, and is no longer needed. Adjust the
include files with what was implicitly included by of_device.h (cpu.h and
of.h) and drop including of_device.h.

Acked-by: Rafael J. Wysocki <rafael@kernel.org>
Acked-by: Daniel Lezcano <daniel.lezcano@linaro.org>
Link: https://lore.kernel.org/r/20230329-dt-cpu-header-cleanups-v1-12-581e2605fe47@kernel.org
Signed-off-by: Rob Herring <robh@kernel.org>

drivers/thermal/cpuidle_cooling.c

@@ -7,12 +7,13 @@
  */
 #define pr_fmt(fmt) "cpuidle cooling: " fmt
 
+#include <linux/cpu.h>
 #include <linux/cpu_cooling.h>
 #include <linux/cpuidle.h>
 #include <linux/device.h>
 #include <linux/err.h>
 #include <linux/idle_inject.h>
-#include <linux/of_device.h>
+#include <linux/of.h>
 #include <linux/slab.h>
 #include <linux/thermal.h>