Add suspend/resume power management relying on PM Runtime engine.
Signed-off-by: NPierre-Yves MORDRET <pierre-yves.mordret@st.com>
Signed-off-by: NAmelie Delaunay <amelie.delaunay@st.com>
Link: https://lore.kernel.org/r/20200127085334.13163-2-amelie.delaunay@st.comSigned-off-by: NVinod Koul <vkoul@kernel.org>