Revert "staging: erofs: disable compiling temporarile"

Revert "staging: erofs: disable compiling temporarile"

This reverts commit 9f3a1511d51dedd70e69919f74a4d60eef6c7d48.

Since XArray and the new mount apis aren't merged in 4.19-rc1
merge window, the BROKEN mark can be reverted directly without
any problems.

Fixes: 9f3a1511d51d ("staging: erofs: disable compiling temporarile")
Cc: Matthew Wilcox <willy@infradead.org>
Cc: David Howells <dhowells@redhat.com>
Reviewed-by: Chao Yu <yuchao0@huawei.com>
Signed-off-by: Gao Xiang <gaoxiang25@huawei.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>