nfsd: Enable building with user namespaces enabled.

Now that the kuids and kgids conversion have propogated
through net/sunrpc/ and the fs/nfsd/ it is safe to enable
building nfsd when user namespaces are enabled.

Cc: "J. Bruce Fields" <bfields@fieldses.org>
Cc: Trond Myklebust <Trond.Myklebust@netapp.com>
Signed-off-by: N"Eric W. Biederman" <ebiederm@xmission.com>

init/Kconfig

@@ -1072,7 +1072,6 @@ config UIDGID_CONVERTED
 
 	# Filesystems
 	depends on CIFS = n
-	depends on NFSD = n
 	depends on XFS_FS = n
 
 config UIDGID_STRICT_TYPE_CHECKS