madvise/madvise03: return TCONF on ENOTSUP

If support for TMPFS (CONFIG_TMPFS) is not compiled in kernel madvise
will return ENOTSUP for these testcases. Return TCONF rather than TFAIL
int this case.

Signed-off-by: Francesco Rundo <francesco.rundo@st.com>
Signed-off-by: Cyril Hrubis <chrubis@suse.cz>
Reviewed-by: Jan Stancek <jstancek@redhat.com>