test: Add tests for board uclass

Add tests for the new board uclass.

Reviewed-by: Simon Glass <sjg@chromium.org>
Signed-off-by: Mario Six <mario.six@gdsys.cc>
diff --git a/drivers/board/Kconfig b/drivers/board/Kconfig
index cc1cf27..2a3fc9c 100644
--- a/drivers/board/Kconfig
+++ b/drivers/board/Kconfig
@@ -10,8 +10,13 @@
 
 
 config BOARD_GAZERBEAM
-	bool "Enable device information for the Gazerbeam board"
+	bool "Enable board driver for the Gazerbeam board"
 	help
 	  Support querying device information for the gdsys Gazerbeam board.
 
+config BOARD_SANDBOX
+	bool "Enable board driver for the Sandbox board"
+	help
+	  Support querying device information for the Sandbox boards.
+
 endif