STM32 DT updates for v5.5, round 1

Highlights:
----------

MPU part:
 -Add and enable ADC support on stm32mp157a-dk1
 -Add DAC support on stm32mp157c-ed1
 -Add and enable VREFBUF support on stm32mp157a-dk1
 -Add focaltech touchscreen on stm32mp157c-dk2
 -Add hdmi support on stm32mp157a-dk1
 -Fix issues seen during YAML DT validation
 -Fix regulators issues for all MPU boards

MCU part:
 -Fix issues seen during YAML DT validation
ARM: dts: stm32: remove useless dma-ranges property for stm32f469

Remove dma-ranges from ltdc node since it is already set
on bus node.

Signed-off-by: Benjamin Gaignard <benjamin.gaignard@st.com>
Signed-off-by: Alexandre Torgue <alexandre.torgue@st.com>
1 file changed