cacheinfo: 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. Update the
includes to use of.h instead of of_device.h.
Acked-by: Sudeep Holla <sudeep.holla@arm.com>
Acked-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Link: https://lore.kernel.org/r/20230329-dt-cpu-header-cleanups-v1-10-581e2605fe47@kernel.orgSigned-off-by: Rob Herring <robh@kernel.org>

drivers/base/cacheinfo.c

@@ -14,7 +14,7 @@
 #include <linux/cpu.h>
 #include <linux/device.h>
 #include <linux/init.h>
-#include <linux/of_device.h>
+#include <linux/of.h>
 #include <linux/sched.h>
 #include <linux/slab.h>
 #include <linux/smp.h>