parisc/irq: Use irq_desc_kstat_cpu() in show_interrupts()

The irq descriptor is already there, no need to look it up again.
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Cc: linux-parisc@vger.kernel.org
Link: https://lore.kernel.org/r/20201210194043.659522455@linutronix.de

arch/parisc/kernel/irq.c

@@ -218,7 +218,7 @@ int show_interrupts(struct seq_file *p, void *v)
 		seq_printf(p, "%3d: ", i);
 
 		for_each_online_cpu(j)
-			seq_printf(p, "%10u ", kstat_irqs_cpu(i, j));
+			seq_printf(p, "%10u ", irq_desc_kstat_cpu(desc, j));
 
 		seq_printf(p, " %14s", irq_desc_get_chip(desc)->name);
 #ifndef PARISC_IRQ_CR16_COUNTS