arch: Kconfig: imply BINMAN for SANDBOX

To be able to use the tool binman on sandbox,
the config SANDBOX should imply BINMAN.

Reviewed-by: Simon Glass <sjg@chromium.org>
Signed-off-by: Philippe Reynes <philippe.reynes@softathome.com>
diff --git a/arch/Kconfig b/arch/Kconfig
index 1b35fda..8450fdb 100644
--- a/arch/Kconfig
+++ b/arch/Kconfig
@@ -205,6 +205,7 @@
 	imply KEYBOARD
 	imply PHYSMEM
 	imply GENERATE_ACPI_TABLE
+	imply BINMAN
 
 config SH
 	bool "SuperH architecture"
diff --git a/arch/sandbox/dts/sandbox.dtsi b/arch/sandbox/dts/sandbox.dtsi
index 66b813f..826db26 100644
--- a/arch/sandbox/dts/sandbox.dtsi
+++ b/arch/sandbox/dts/sandbox.dtsi
@@ -7,6 +7,9 @@
 #define USB_CLASS_HUB			9
 
 / {
+	binman {
+	};
+
 	chosen {
 		stdout-path = "/serial";
 	};
diff --git a/arch/sandbox/dts/test.dts b/arch/sandbox/dts/test.dts
index 3d206fd..05c1cd5 100644
--- a/arch/sandbox/dts/test.dts
+++ b/arch/sandbox/dts/test.dts
@@ -61,6 +61,9 @@
 		osd0 = "/osd";
 	};
 
+	binman {
+	};
+
 	config {
 		testing-bool;
 		testing-int = <123>;