[MIPS] Fix broken rm7000/rm9000 interrupt handling

Properly acknowledge RM7K and RM9K interrupts. Before this, interrupts were
permanently masked after their first occurrence, making them non-functional.

Signed-off-by: Thomas Koeller <thomas.koeller@baslerweb.com>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
diff --git a/arch/mips/kernel/irq-rm7000.c b/arch/mips/kernel/irq-rm7000.c
index 971adf6..fb50cc7 100644
--- a/arch/mips/kernel/irq-rm7000.c
+++ b/arch/mips/kernel/irq-rm7000.c
@@ -33,6 +33,7 @@
 	.mask = mask_rm7k_irq,
 	.mask_ack = mask_rm7k_irq,
 	.unmask = unmask_rm7k_irq,
+	.eoi	= unmask_rm7k_irq
 };
 
 void __init rm7k_cpu_irq_init(void)
diff --git a/arch/mips/kernel/irq-rm9000.c b/arch/mips/kernel/irq-rm9000.c
index 7b04583..ed9febe 100644
--- a/arch/mips/kernel/irq-rm9000.c
+++ b/arch/mips/kernel/irq-rm9000.c
@@ -75,6 +75,7 @@
 	.mask = mask_rm9k_irq,
 	.mask_ack = mask_rm9k_irq,
 	.unmask = unmask_rm9k_irq,
+	.eoi	= unmask_rm9k_irq
 };
 
 static struct irq_chip rm9k_perfcounter_irq = {