m68k/atari: 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>
diff --git a/arch/m68k/atari/atakeyb.c b/arch/m68k/atari/atakeyb.c
index b995513..db26f0e 100644
--- a/arch/m68k/atari/atakeyb.c
+++ b/arch/m68k/atari/atakeyb.c
@@ -575,7 +575,7 @@
 	kb_state.len = 0;
 
 	error = request_irq(IRQ_MFP_ACIA, atari_keyboard_interrupt,
-			    IRQ_TYPE_SLOW, "keyboard/mouse/MIDI",
+			    IRQ_TYPE_SLOW, "keyboard,mouse,MIDI",
 			    atari_keyboard_interrupt);
 	if (error)
 		return error;