fixup! tests: driver: spi: add overlay for xg23_rb4210a board

Author: Martinhoff-maker

tests/drivers/spi/spi_loopback/boards/xg23_rb4210a.overlay

@@ -26,7 +26,7 @@
 	fast@1 {
 		compatible = "test-spi-loopback-fast";
 		reg = <1>;
-		spi-max-frequency = <20000000>;
+		spi-max-frequency = <10000000>;
 	};
 };