gallium: add PIPE_CAP_TGSI_VOTE for when the VOTE ops are allowed

Signed-off-by: Ilia Mirkin <imirkin@alum.mit.edu>
Reviewed-by: Dave Airlie <airlied@redhat.com>
diff --git a/src/gallium/drivers/swr/swr_screen.cpp b/src/gallium/drivers/swr/swr_screen.cpp
index 0772274..361b17a 100644
--- a/src/gallium/drivers/swr/swr_screen.cpp
+++ b/src/gallium/drivers/swr/swr_screen.cpp
@@ -360,6 +360,7 @@
    case PIPE_CAP_FRAMEBUFFER_NO_ATTACHMENT:
    case PIPE_CAP_CULL_DISTANCE:
    case PIPE_CAP_PRIMITIVE_RESTART_FOR_PATCHES:
+   case PIPE_CAP_TGSI_VOTE:
       return 0;
    }