arm: dts: am335x: enable scm_clocks auto binding

Adding the 'simple-bus' compatible string to the scm_clocks node will
allow its automatic binding.

Signed-off-by: Dario Binacchi <dariobin@libero.it>

arch/arm/dts/am33xx-u-boot.dtsi

@@ -13,3 +13,7 @@
 &prcm_clocks {
 	compatible = "simple-bus";
 };
+
+&scm_clocks {
+	compatible = "simple-bus";
+};

arch/arm/dts/dm8168-evm-u-boot.dtsi

@@ -0,0 +1,12 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * dm8168-evm U-Boot Additions
+ *
+ * Copyright (C) 2020 Dario Binacchi <dariobin@libero.it>
+ */
+
+/ {
+	ocp {
+		u-boot,dm-pre-reloc;
+	};
+};