drm/radeon: Respect AGP cant_use_aperture flag.

Some AGP devices can't map the aperture, radeon needs to tell TTM this.
Signed-off-by: Dave Airlie <airlied@redhat.com>

drivers/gpu/drm/radeon/radeon_ttm.c

@@ -133,6 +133,7 @@ static int radeon_init_mem_type(struct ttm_bo_device *bdev, uint32_t type,
 		man->gpu_offset = 0;
 		man->available_caching = TTM_PL_MASK_CACHING;
 		man->default_caching = TTM_PL_FLAG_CACHED;
+		man->flags = TTM_MEMTYPE_FLAG_MAPPABLE | TTM_MEMTYPE_FLAG_CMA;
 #if __OS_HAS_AGP
 		if (rdev->flags & RADEON_IS_AGP) {
 			if (!(drm_core_has_AGP(rdev->ddev) && rdev->ddev->agp)) {
@@ -143,6 +144,7 @@ static int radeon_init_mem_type(struct ttm_bo_device *bdev, uint32_t type,
 			man->io_offset = rdev->mc.agp_base;
 			man->io_size = rdev->mc.gtt_size;
 			man->io_addr = NULL;
+			if (!rdev->ddev->agp->cant_use_aperture)
 				man->flags = TTM_MEMTYPE_FLAG_NEEDS_IOREMAP |
 					     TTM_MEMTYPE_FLAG_MAPPABLE;
 			man->available_caching = TTM_PL_FLAG_UNCACHED |
@@ -154,8 +156,6 @@ static int radeon_init_mem_type(struct ttm_bo_device *bdev, uint32_t type,
 			man->io_offset = 0;
 			man->io_size = 0;
 			man->io_addr = NULL;
-			man->flags = TTM_MEMTYPE_FLAG_MAPPABLE |
-				     TTM_MEMTYPE_FLAG_CMA;
 		}
 		break;
 	case TTM_PL_VRAM: