Staging: dream: mark as BROKEN

It doesn't build, and hasn't for a long time (if ever).  So mark
it BROKEN for now.

Cc: Pavel Machek <pavel@ucw.cz>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

drivers/staging/dream/Kconfig

 config DREAM
        tristate "HTC Dream support"
+       depends on BROKEN
 
 source "drivers/staging/dream/smd/Kconfig"