Revert "staging: board: disable as it breaks the build"

This reverts commit d13778d5.

Commit 13c11072 ("staging:board: remove unnecessary function")
fixed the build of drivers/staging/board/board.c.
Signed-off-by: NGeert Uytterhoeven <geert+renesas@glider.be>
Reviewed-by: NSimon Horman <horms+renesas@verge.net.au>
Acked-by: NSimon Horman <horms+renesas@verge.net.au>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/board/Kconfig

 config STAGING_BOARD
 	bool "Staging Board Support"
 	depends on OF_ADDRESS
-	depends on BROKEN
 	help
 	  Select to enable per-board staging support code.