reset: sti: Document sti-picophyreset controllers bindings.

Add DT bindings documentation for sti-picophyreset controller.

Signed-off-by: Peter Griffin <peter.griffin@linaro.org>
Acked-by: Lee Jones <lee.jones@linaro.org>
Signed-off-by: Maxime Coquelin <maxime.coquelin@st.com>
1 file changed