msm: pcie: mpq8064: Add system wakeup support to PCIe controller

Update the PCIe controller to register for wakeup interrupt enabling
the PCIe devices to wakeup the system if suspended.

Change-Id: I49960702c0abc1e1406dff622843456e0f0547c6
Signed-off-by: Niranjana Vishwanathapura <nvishwan@codeaurora.org>
diff --git a/arch/arm/mach-msm/pcie.h b/arch/arm/mach-msm/pcie.h
index fba6b11..d7cce3e 100644
--- a/arch/arm/mach-msm/pcie.h
+++ b/arch/arm/mach-msm/pcie.h
@@ -68,6 +68,8 @@
 	uint32_t                      axi_bar_end;
 
 	struct resource               dev_mem_res;
+
+	uint32_t                      wake_n;
 };
 
 extern uint32_t msm_pcie_irq_init(struct msm_pcie_dev_t *dev);