nv40: Implement PIPE_CAP_MAX_COMBINED_SAMPLERS.

src/gallium/drivers/nv40/nv40_screen.c

@@ -62,6 +62,8 @@ nv40_screen_get_param(struct pipe_screen *pscreen, int param)
 	case PIPE_CAP_TGSI_FS_COORD_ORIGIN_UPPER_LEFT:
 	case PIPE_CAP_TGSI_FS_COORD_PIXEL_CENTER_INTEGER:
 		return 0;
+	case PIPE_CAP_MAX_COMBINED_SAMPLERS:
+		return 16;
 	default:
 		NOUVEAU_ERR("Unknown PIPE_CAP %d\n", param);
 		return 0;