gallium: add PIPE_SHADER_CAP_LOWER_IF_THRESHOLD

Reviewed-by: Nicolai Hähnle <nicolai.haehnle@amd.com>
diff --git a/src/gallium/drivers/freedreno/freedreno_screen.c b/src/gallium/drivers/freedreno/freedreno_screen.c
index 97da0d7..4fe9a36 100644
--- a/src/gallium/drivers/freedreno/freedreno_screen.c
+++ b/src/gallium/drivers/freedreno/freedreno_screen.c
@@ -499,6 +499,7 @@
 		return 32;
 	case PIPE_SHADER_CAP_MAX_SHADER_BUFFERS:
 	case PIPE_SHADER_CAP_MAX_SHADER_IMAGES:
+	case PIPE_SHADER_CAP_LOWER_IF_THRESHOLD:
 		return 0;
 	}
 	debug_printf("unknown shader param %d\n", param);