apq8084: Add support for volume up/down keys, reboot and usb

Change-Id: I761eb82a05deaca228366edd243479d4ea9f36c9
diff --git a/platform/apq8084/include/platform/iomap.h b/platform/apq8084/include/platform/iomap.h
index 27812cc..9d6f15b 100644
--- a/platform/apq8084/include/platform/iomap.h
+++ b/platform/apq8084/include/platform/iomap.h
@@ -31,6 +31,10 @@
 
 #define MSM_SHARED_BASE             0x0FA00000
 
+#define MSM_SHARED_IMEM_BASE        0xFE805000
+
+#define RESTART_REASON_ADDR         (MSM_SHARED_IMEM_BASE + 0x65C)
+
 #define KPSS_BASE                   0xF9000000
 
 #define MSM_GIC_DIST_BASE           KPSS_BASE