powerpc/mpc8610_hpcd: Do not use "/" in interrupt names

It may trigger a warning in fs/proc/generic.c:__xlate_proc_name() when
trying to add an entry for the interrupt handler to sysfs.
Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>
Acked-by: Timur Tabi <timur@freescale.com>
Signed-off-by: Kumar Gala <galak@kernel.crashing.org>

arch/powerpc/platforms/86xx/mpc8610_hpcd.c

@@ -66,7 +66,7 @@ static void __init mpc8610_suspend_init(void)
 		return;
 	}
 
-	ret = request_irq(irq, mpc8610_sw9_irq, 0, "sw9/wakeup", NULL);
+	ret = request_irq(irq, mpc8610_sw9_irq, 0, "sw9:wakeup", NULL);
 	if (ret) {
 		pr_err("%s: can't request pixis event IRQ: %d\n",
 		       __func__, ret);