drm/radeon: keep start and end offset in the SA

Instead of offset + size keep start and end offset directly.

Signed-off-by: Christian König <deathsimple@vodafone.de>
Signed-off-by: Dave Airlie <airlied@redhat.com>
diff --git a/drivers/gpu/drm/radeon/radeon.h b/drivers/gpu/drm/radeon/radeon.h
index 8a6b1b3..d1c2154 100644
--- a/drivers/gpu/drm/radeon/radeon.h
+++ b/drivers/gpu/drm/radeon/radeon.h
@@ -396,8 +396,8 @@
 struct radeon_sa_bo {
 	struct list_head		list;
 	struct radeon_sa_manager	*manager;
-	unsigned			offset;
-	unsigned			size;
+	unsigned			soffset;
+	unsigned			eoffset;
 };
 
 /*