Btrfs: Add RAID10 support

Signed-off-by: Chris Mason <chris.mason@oracle.com>
diff --git a/fs/btrfs/extent-tree.c b/fs/btrfs/extent-tree.c
index 71f045c..4e5bd62 100644
--- a/fs/btrfs/extent-tree.c
+++ b/fs/btrfs/extent-tree.c
@@ -1042,6 +1042,7 @@
 {
 	u64 extra_flags = flags & (BTRFS_BLOCK_GROUP_RAID0 |
 				   BTRFS_BLOCK_GROUP_RAID1 |
+				   BTRFS_BLOCK_GROUP_RAID10 |
 				   BTRFS_BLOCK_GROUP_DUP);
 	if (extra_flags) {
 		if (flags & BTRFS_BLOCK_GROUP_DATA)