m68k: mac core - Kill warn_unused_result warnings

warning: ignoring return value of 'request_irq', declared with attribute
warn_unused_result

Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>
diff --git a/arch/m68k/mac/baboon.c b/arch/m68k/mac/baboon.c
index 245d16d..2a96beb 100644
--- a/arch/m68k/mac/baboon.c
+++ b/arch/m68k/mac/baboon.c
@@ -92,7 +92,8 @@
 void __init baboon_register_interrupts(void)
 {
 	baboon_disabled = 0;
-	request_irq(IRQ_NUBUS_C, baboon_irq, 0, "baboon", (void *)baboon);
+	if (request_irq(IRQ_NUBUS_C, baboon_irq, 0, "baboon", (void *)baboon))
+		pr_err("Couldn't register baboon interrupt\n");
 }
 
 /*