fs: Enable tmpfs ACL by default

TODO: Add bloat-o-meter comment and explain why.

This goes upstream.
Signed-off-by: Ezequiel Garcia <ezequiel@collabora.com>

fs/Kconfig

@@ -171,6 +171,7 @@ config TMPFS_POSIX_ACL
 	depends on TMPFS
 	select TMPFS_XATTR
 	select FS_POSIX_ACL
+	default y
 	help
 	  POSIX Access Control Lists (ACLs) support additional access rights
 	  for users and groups beyond the standard owner/group/world scheme,