ARM: DT: STi: STiH416: Add DT node for ST's SATA device

Cc: devicetree@vger.kernel.org
Acked-by: NAlexandre Torgue <alexandre.torgue@st.com>
Signed-off-by: NLee Jones <lee.jones@linaro.org>
Signed-off-by: NMaxime Coquelin <maxime.coquelin@st.com>