Add SPDX identifiers to files under sti directory
Signed-off-by: NBenjamin Gaignard <benjamin.gaignard@st.com>
Reviewed-by: NFabien Dessenne <fabien.dessenne@st.com>
Acked-by: NPhilippe Ombredanne <pombredanne@nexb.com>
Acked-by: NHugues Fruchet <hugues.fruchet@st.com>
Signed-off-by: NMauro Carvalho Chehab <mchehab@s-opensource.com>