Drivers should extract device-tree data before probing via the
.of_to_plat hook.
Implement it for stm32_ltdc driver. No functional change.
Signed-off-by: Raphael Gallais-Pou <raphael.gallais-pou@foss.st.com>
Reviewed-by: Patrice Chotard <patrice.chotard@foss.st.com>