irqchip: Prepare for local stub header removal

The IRQCHIP_DECLARE macro moved to to 'include/linux/irqchip.h', so
the local irqchip.h became an empty shell, which solely includes
include/linux/irqchip.h

Include the global header in all irqchip drivers instead of the local
header, so we can remove it.

Signed-off-by: Joel Porquet <joel@porquet.org>
Cc: vgupta@synopsys.com
Cc: monstr@monstr.eu
Cc: ralf@linux-mips.org
Cc: jason@lakedaemon.net
Link: http://lkml.kernel.org/r/1882096.X39jVG8e0D@joel-zenbook
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
diff --git a/drivers/irqchip/irq-sun4i.c b/drivers/irqchip/irq-sun4i.c
index 83d6aa6..4ad3e7c 100644
--- a/drivers/irqchip/irq-sun4i.c
+++ b/drivers/irqchip/irq-sun4i.c
@@ -16,6 +16,7 @@
 
 #include <linux/io.h>
 #include <linux/irq.h>
+#include <linux/irqchip.h>
 #include <linux/of.h>
 #include <linux/of_address.h>
 #include <linux/of_irq.h>
@@ -23,8 +24,6 @@
 #include <asm/exception.h>
 #include <asm/mach/irq.h>
 
-#include "irqchip.h"
-
 #define SUN4I_IRQ_VECTOR_REG		0x00
 #define SUN4I_IRQ_PROTECTION_REG	0x08
 #define SUN4I_IRQ_NMI_CTRL_REG		0x0c