staging: memrar depends on RAR_REGISTER

Alan said that memrar should depend on RAR_REGISTER
(instead of selecting it).
Signed-off-by: Randy Dunlap <randy.dunlap@oracle.com>
Cc: Ossama Othman <ossama.othman@intel.com>
Cc: Alan Cox <alan@lxorguk.ukuu.org.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

drivers/staging/memrar/Kconfig

 config MRST_RAR_HANDLER
 	tristate "RAR handler driver for Intel Moorestown platform"
-	select RAR_REGISTER
+	depends on RAR_REGISTER
 	---help---
 	  This driver provides a memory management interface to
 	  restricted access regions (RAR) available on the Intel