MIPS/irqchip: Move i8259 irqchip driver to drivers/irqchip

Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
diff --git a/drivers/irqchip/Kconfig b/drivers/irqchip/Kconfig
index 120d815..5b85371 100644
--- a/drivers/irqchip/Kconfig
+++ b/drivers/irqchip/Kconfig
@@ -61,6 +61,10 @@
 	select MULTI_IRQ_HANDLER
 	select SPARSE_IRQ
 
+config I8259
+	bool
+	select IRQ_DOMAIN
+
 config BCM7038_L1_IRQ
 	bool
 	select GENERIC_IRQ_CHIP