parisc/irq: Simplify irq count output for /proc/interrupts

The SMP variant works perfectly fine on UP as well.
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Cc: linux-parisc@vger.kernel.org
Link: https://lore.kernel.org/r/20201210194043.172893840@linutronix.de

arch/parisc/kernel/irq.c

@@ -216,12 +216,9 @@ int show_interrupts(struct seq_file *p, void *v)
 		if (!action)
 			goto skip;
 		seq_printf(p, "%3d: ", i);
-#ifdef CONFIG_SMP
+
 		for_each_online_cpu(j)
 			seq_printf(p, "%10u ", kstat_irqs_cpu(i, j));
-#else
-		seq_printf(p, "%10u ", kstat_irqs(i));
-#endif
 
 		seq_printf(p, " %14s", irq_desc_get_chip(desc)->name);
 #ifndef PARISC_IRQ_CR16_COUNTS