dax: remove "depends on BROKEN" from FS_DAX_PMD

Now that DAX PMD faults are once again working and are now participating in
DAX's radix tree locking scheme, allow their config option to be enabled.

Signed-off-by: Ross Zwisler <ross.zwisler@linux.intel.com>
Reviewed-by: Jan Kara <jack@suse.cz>
Signed-off-by: Dave Chinner <david@fromorbit.com>

diff --git a/fs/Kconfig b/fs/Kconfig
index 4bd03a2..8e9e5f41 100644
--- a/fs/Kconfig
+++ b/fs/Kconfig
@@ -55,7 +55,6 @@
 	depends on FS_DAX
 	depends on ZONE_DEVICE
 	depends on TRANSPARENT_HUGEPAGE
-	depends on BROKEN
 
 endif # BLOCK