gallium: Add PIPE_CAP_START_INSTANCE

Reviewed-by: Brian Paul <brianp@vmware.com>
diff --git a/src/gallium/drivers/svga/svga_screen.c b/src/gallium/drivers/svga/svga_screen.c
index 64ec658..b137e95 100644
--- a/src/gallium/drivers/svga/svga_screen.c
+++ b/src/gallium/drivers/svga/svga_screen.c
@@ -243,6 +243,7 @@
    case PIPE_CAP_GLSL_FEATURE_LEVEL:
    case PIPE_CAP_VERTEX_BUFFER_OFFSET_4BYTE_ALIGNED_ONLY:
    case PIPE_CAP_VERTEX_BUFFER_STRIDE_4BYTE_ALIGNED_ONLY:
+   case PIPE_CAP_START_INSTANCE:
       return 0;
    case PIPE_CAP_VERTEX_ELEMENT_SRC_OFFSET_4BYTE_ALIGNED_ONLY:
       return 1;