[drm] Update ioctl structures for DRM driver

BZ: 158934

Fix structure definitions so that they matches with the corresponding structures in the kernel source tree

Change-Id: I25657f763e27d7c10e876711b3bdc10cfb9577b7
Signed-off-by: Rajat S Gupta <rajat.s.gupta@intel.com>
Signed-off-by: Andy Qiu <junhai.qiu@intel.com>
diff --git a/shared-core/drm_mode.h b/shared-core/drm_mode.h
index b0170c5..3bc74e8 100644
--- a/shared-core/drm_mode.h
+++ b/shared-core/drm_mode.h
@@ -186,6 +186,8 @@
 	__u32 connection;
 	__u32 mm_width, mm_height; /**< HxW in millimeters */
 	__u32 subpixel;
+
+	__u32 pad;
 };
 
 #define DRM_MODE_PROP_PENDING	(1<<0)