bootstd: Add vbe bootmeth into sandbox

Update sandbox to include the VBE bootmeth. Update a few existing tests to
take account of this change, specifically that the new bootmeth now
appears when scanning.

Signed-off-by: Simon Glass <sjg@chromium.org>
diff --git a/arch/sandbox/dts/test.dts b/arch/sandbox/dts/test.dts
index d1a8cc7..2761588 100644
--- a/arch/sandbox/dts/test.dts
+++ b/arch/sandbox/dts/test.dts
@@ -1387,6 +1387,21 @@
 			compatible = "denx,u-boot-fdt-test";
 			reg = <9 1>;
 		};
+
+		fwupd {
+			compatible = "simple-bus";
+			firmware0 {
+				compatible = "fwupd,vbe-simple";
+				storage = "mmc1";
+				area-start = <0x400>;
+				area-size = <0x1000>;
+				skip-offset = <0x200>;
+				state-offset = <0x400>;
+				state-size = <0x40>;
+				version-offset = <0x800>;
+				version-size = <0x100>;
+			};
+		};
 	};
 
 	translation-test@8000 {