The icu_irq_chip is deifned in <linux/irqchip/mmp.h> but the
irq-mmp.c does not include this to get the definition of this
symbol. Include the header to fix the following sparse warning:

drivers/irqchip/irq-mmp.c:139:17: warning: symbol 'icu_irq_chip' was not declared. Should it be static?

Signed-off-by: Ben Dooks <ben-linux@fluff.org>
---
 drivers/irqchip/irq-mmp.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/irqchip/irq-mmp.c b/drivers/irqchip/irq-mmp.c
index 83455ca72439..dcc30bee572e 100644
--- a/drivers/irqchip/irq-mmp.c
+++ b/drivers/irqchip/irq-mmp.c
@@ -14,6 +14,7 @@
 #include <linux/irq.h>
 #include <linux/irqchip.h>
 #include <linux/irqchip/chained_irq.h>
+#include <linux/irqchip/mmp.h>
 #include <linux/irqdomain.h>
 #include <linux/io.h>
 #include <linux/ioport.h>
-- 
2.35.1