x86/pci-calgary: Use setup_timer() instead of open coding it.

Use setup_timer() instead of init_timer() to simplify the code.
Signed-off-by: Geliang Tang <geliangtang@gmail.com>
Cc: iommu@lists.linux-foundation.org
Cc: Jon Mason <jdmason@kudzu.us>
Cc: Muli Ben-Yehuda <mulix@mulix.org>
Link: http://lkml.kernel.org/r/e4f1888b9e4a87f6a6345f86ed23071483763b22.1490340972.git.geliangtang@gmail.comSigned-off-by: Thomas Gleixner <tglx@linutronix.de>

arch/x86/kernel/pci-calgary_64.c

@@ -1007,9 +1007,8 @@ static void __init calgary_enable_translation(struct pci_dev *dev)
 	writel(cpu_to_be32(val32), target);
 	readl(target); /* flush */
 
-	init_timer(&tbl->watchdog_timer);
-	tbl->watchdog_timer.function = &calgary_watchdog;
-	tbl->watchdog_timer.data = (unsigned long)dev;
+	setup_timer(&tbl->watchdog_timer, &calgary_watchdog,
+		    (unsigned long)dev);
 	mod_timer(&tbl->watchdog_timer, jiffies);
 }