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>
diff --git a/arch/sandbox/dts/sandbox.dts b/arch/sandbox/dts/sandbox.dts
index fb866e8..1cda911 100644
--- a/arch/sandbox/dts/sandbox.dts
+++ b/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;
+	};
+};