xfs: Work around GCC 12 -Werror=dangling-pointer for xfs_attr_remote.o

This is to fix build failure when we enable -Werror. It's still in discussion.

There seems no way to disable it only for xfs_attr_remote.o as there is only a
makefile in the parent directory. So Let's temporarily disable for fs/xfs/.

Link: https://bugzilla.kernel.org/show_bug.cgi?id=215851

Signed-off-by: He Zhe <zhe.he@windriver.com>
Signed-off-by: Bruce Ashfield <bruce.ashfield@gmail.com>