mailbox: Switch to use hrtimer_setup()

hrtimer_setup() takes the callback function pointer as argument and
initializes the timer completely.

Replace hrtimer_init() and the open coded initialization of
hrtimer::function with the new setup mechanism.

Patch was created by using Coccinelle.

Signed-off-by: Nam Cao <[email protected]>
Signed-off-by: Thomas Gleixner <[email protected]>
Acked-by: Zack Rusin <[email protected]>
Link: https://lore.kernel.org/all/b742f81b6acdaa604511834a06a8aac3e6e63ca3.1738746904.git.namcao@linutronix.de

Author: covanam

drivers/mailbox/mailbox.c

@@ -534,9 +534,7 @@ int mbox_controller_register(struct mbox_controller *mbox)
 			return -EINVAL;
 		}
 
-		hrtimer_init(&mbox->poll_hrt, CLOCK_MONOTONIC,
-			     HRTIMER_MODE_REL);
-		mbox->poll_hrt.function = txdone_hrtimer;
+		hrtimer_setup(&mbox->poll_hrt, txdone_hrtimer, CLOCK_MONOTONIC, HRTIMER_MODE_REL);
 		spin_lock_init(&mbox->poll_hrt_lock);
 	}