radeon: reading back to scratch reg through status map doesn't work

For some unknown reasons the scratch reg value doesn't endup in the status
map at the scratch reg offset, this is a temporary work around until we
figure out why it doesn't work.

src/mesa/drivers/dri/radeon/radeon_bo_legacy.c

@@ -48,6 +48,7 @@
 #include "radeon_drm.h"
 #include "radeon_common.h"
 #include "radeon_bocs_wrapper.h"
+#include "radeon_macros.h"
 
 /* no seriously texmem.c is this screwed up */
 struct bo_legacy_texture_object {
@@ -164,6 +165,7 @@ static int legacy_free_handle(struct bo_manager_legacy *bom, uint32_t handle)
 static void legacy_get_current_age(struct bo_manager_legacy *boml)
 {
     drm_radeon_getparam_t gp;
+    unsigned char *RADEONMMIO = NULL;
     int r;
 
     if (IS_R300_CLASS(boml->screen)) {
@@ -175,8 +177,11 @@ static void legacy_get_current_age(struct bo_manager_legacy *boml)
        	 fprintf(stderr, "%s: drmRadeonGetParam: %d\n", __FUNCTION__, r);
          exit(1);
        }
-    } else
-	boml->current_age = boml->screen->scratch[3];
+    } else {
+        RADEONMMIO = boml->screen->mmio.map;
+        boml->current_age = boml->screen->scratch[3];
+        boml->current_age = INREG(RADEON_GUI_SCRATCH_REG3);
+    }
 }
 
 static int legacy_is_pending(struct radeon_bo *bo)