bus: vexpress-config: Add explicit of_platform.h include

vexpress-config uses of_platform_* functions which are declared in
of_platform.h. of_platform.h gets implicitly included by of_device.h,
but that is going to be removed soon. Nothing else depends on
of_device.h so it can be dropped.

Signed-off-by: Rob Herring <robh@kernel.org>
Acked-by: Liviu Dudau <liviu.dudau@arm.com>
Link: https://lore.kernel.org/r/20230410232727.1562115-1-robh@kernel.org
Signed-off-by: Sudeep Holla <sudeep.holla@arm.com>

drivers/bus/vexpress-config.c

@@ -10,7 +10,7 @@
 #include <linux/module.h>
 #include <linux/of.h>
 #include <linux/platform_device.h>
-#include <linux/of_device.h>
+#include <linux/of_platform.h>
 #include <linux/sched/signal.h>
 #include <linux/slab.h>
 #include <linux/vexpress.h>