[RESEND PATCH] soc: apple: mailbox: Add explicit include of platform_device.h

[Rob Herring]

The DT of_device.h and of_platform.h date back to the separate
of_platform_bus_type before it as merged into the regular platform bus.
As part of that merge prepping Arm DT support 13 years ago, they
"temporarily" include each other and pull in various other headers. In
preparation to fix this, adjust the includes for what is actually needed.

platform_device.h is implicitly included by of_platform.h, but that's going
to be removed.

Signed-off-by: Rob Herring <robh at kernel.org>
---
Note this was added in the merge window and missed the last round.

Arnd, Can you apply this directly.

---
 drivers/soc/apple/mailbox.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/soc/apple/mailbox.c b/drivers/soc/apple/mailbox.c
index 0cbd172f435e..780199bf351e 100644
--- a/drivers/soc/apple/mailbox.c
+++ b/drivers/soc/apple/mailbox.c
@@ -26,6 +26,7 @@
 #include <linux/module.h>
 #include <linux/of.h>
 #include <linux/of_platform.h>
+#include <linux/platform_device.h>
 #include <linux/pm_runtime.h>
 #include <linux/spinlock.h>
 #include <linux/types.h>
-- 
2.42.0