zte's code,first commit

Change-Id: I9a04da59e459a9bc0d67f101f700d9d7dc8d681b
diff --git a/ap/os/linux/linux-3.4.x/drivers/irqchip/Makefile b/ap/os/linux/linux-3.4.x/drivers/irqchip/Makefile
new file mode 100644
index 0000000..389b1d1
--- /dev/null
+++ b/ap/os/linux/linux-3.4.x/drivers/irqchip/Makefile
@@ -0,0 +1 @@
+obj-$(CONFIG_PLAT_ZTE)		+= irq-zx29.o