[ARM] S3C64XX: Add IRQ_EINT support

Add the necessary code to support IRQ_EINT(x) on
the S3C64XX series of CPUs.

Note, since there is no GPIO configuration support
in the kernel, the irq set_type method does not
configure the relevant pin to interrupt.

Signed-off-by: Ben Dooks <ben-linux@fluff.org>
diff --git a/arch/arm/plat-s3c64xx/Makefile b/arch/arm/plat-s3c64xx/Makefile
index 9e055d4..9c09b08 100644
--- a/arch/arm/plat-s3c64xx/Makefile
+++ b/arch/arm/plat-s3c64xx/Makefile
@@ -15,6 +15,7 @@
 obj-y				+= dev-uart.o
 obj-y				+= cpu.o
 obj-y				+= irq.o
+obj-y				+= irq-eint.o
 obj-y				+= clock.o
 
 # CPU support