drm: add radeon PCI express support

Add support for Radeon PCI Express cards (needs a new X.org DDX)
Also allows PCI GART table to be stored in VRAM for non PCIE cards

Signed-off-by: Dave Airlie <airlied@linux.ie>
diff --git a/drivers/char/drm/radeon_state.c b/drivers/char/drm/radeon_state.c
index c4325f1..74c2fe8 100644
--- a/drivers/char/drm/radeon_state.c
+++ b/drivers/char/drm/radeon_state.c
@@ -3034,6 +3034,9 @@
 			dev_priv->sarea_priv->tiling_enabled = 1;
 		}
 		break;	
+	case RADEON_SETPARAM_PCIGART_LOCATION:
+		dev_priv->pcigart_offset = sp.value;
+		break;
 	default:
 		DRM_DEBUG( "Invalid parameter %d\n", sp.param );
 		return DRM_ERR( EINVAL );