plat-orion: share IRQ handling code

Split off Orion IRQ handling code into plat-orion/, and add
support for multiple sets of (32) interrupts.

Signed-off-by: Lennert Buytenhek <buytenh@marvell.com>
Reviewed-by: Tzachi Perelstein <tzachi@marvell.com>
Acked-by: Russell King <rmk+kernel@arm.linux.org.uk>
Signed-off-by: Nicolas Pitre <nico@marvell.com>
diff --git a/include/asm-arm/plat-orion/irq.h b/include/asm-arm/plat-orion/irq.h
new file mode 100644
index 0000000..94aeed9
--- /dev/null
+++ b/include/asm-arm/plat-orion/irq.h
@@ -0,0 +1,17 @@
+/*
+ * include/asm-arm/plat-orion/irq.h
+ *
+ * Marvell Orion SoC IRQ handling.
+ *
+ * This file is licensed under the terms of the GNU General Public
+ * License version 2.  This program is licensed "as is" without any
+ * warranty of any kind, whether express or implied.
+ */
+
+#ifndef __ASM_PLAT_ORION_IRQ_H
+#define __ASM_PLAT_ORION_IRQ_H
+
+void orion_irq_init(unsigned int irq_start, void __iomem *maskaddr);
+
+
+#endif