x86: hardirq: use inc_irq_stat() in non-unified functions

Impact: cleanup

Replace incrementing irq stat with inc_irq_stat() in non-unified functions.

Signed-off-by: Hiroshi Shimamoto <h-shimamoto@ct.jp.nec.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
diff --git a/arch/x86/kernel/time_64.c b/arch/x86/kernel/time_64.c
index 418a095..1749cac 100644
--- a/arch/x86/kernel/time_64.c
+++ b/arch/x86/kernel/time_64.c
@@ -51,7 +51,7 @@
 
 irqreturn_t timer_interrupt(int irq, void *dev_id)
 {
-	add_pda(irq0_irqs, 1);
+	inc_irq_stat(irq0_irqs);
 
 	global_clock_event->event_handler(global_clock_event);