sandbox: Update some drivers to work in SPL/TPL

At present sandbox drivers are mostly not used before relocation. Some of
these are needed by Chromium OS verified boot, since it uses sandbox TPL,
so update them accordingly.

Signed-off-by: Simon Glass <sjg@chromium.org>

arch/sandbox/dts/sandbox.dts

@@ -20,6 +20,7 @@
 
 	cros_ec: cros-ec {
 		reg = <0 0>;
+		u-boot,dm-pre-reloc;
 		compatible = "google,cros-ec-sandbox";
 
 		/*
@@ -27,6 +28,7 @@
 		 * that the STM32L flash erases to 0, not 0xff.
 		 */
 		flash {
+			u-boot,dm-pre-reloc;
 			image-pos = <0x08000000>;
 			size = <0x20000>;
 			erase-value = <0>;
@@ -59,6 +61,7 @@
 	};
 
 	gpio_a: gpios@0 {
+		u-boot,dm-pre-reloc;
 		gpio-controller;
 		compatible = "sandbox,gpio";
 		#gpio-cells = <1>;
@@ -67,6 +70,7 @@
 	};
 
 	gpio_b: gpios@1 {
+		u-boot,dm-pre-reloc;
 		gpio-controller;
 		compatible = "sandbox,gpio";
 		#gpio-cells = <2>;
@@ -178,12 +182,14 @@
 	};
 
 	spi@0 {
+		u-boot,dm-pre-reloc;
 		#address-cells = <1>;
 		#size-cells = <0>;
 		reg = <0 0>;
 		compatible = "sandbox,spi";
 		cs-gpios = <0>, <&gpio_a 0>;
 		firmware_storage_spi: flash@0 {
+			u-boot,dm-pre-reloc;
 			reg = <0>;
 			compatible = "spansion,m25p16", "sandbox,spi-flash";
 			spi-max-frequency = <40000000>;
@@ -239,6 +245,7 @@
 	};
 
 	tpm {
+		u-boot,dm-pre-reloc;
 		compatible = "google,sandbox-tpm";
 	};
 
@@ -256,6 +263,7 @@
 
 	/* Needs to be available prior to relocation */
 	uart0: serial {
+		u-boot,dm-spl;
 		compatible = "sandbox,serial";
 		sandbox,text-colour = "cyan";
 		pinctrl-names = "default";
@@ -350,3 +358,10 @@
 
 #include "cros-ec-keyboard.dtsi"
 #include "sandbox_pmic.dtsi"
+
+&cros_ec {
+	u-boot,dm-pre-reloc;
+	keyboard-controller {
+		u-boot,dm-pre-reloc;
+	};
+};