dts: arm: st: l4: stm32l4r9: add LTDC display controller node
dts: arm: st: l4: stm32l4r9: add LTDC display controller node

Add LTDC display controller peripheral node to device tree

Signed-off-by: Tomislav Milkovic <2161fd1c3ce8f78557aeb421b2032be96a827bf6@gmail.com>

zephyrproject-rtos/zephyr,zephyrproject-rtos/zephyr,zephyrproject-rtos/zephyr,finikorg/zephyr,finikorg/zephyr,galak/zephyr,finikorg/zephyr,finikorg/zephyr,galak/zephyr,galak/zephyr,galak/zephyr,zephyrproject-rtos/zephyr,finikorg/zephyr,galak/zephyr,zephyrproject-rtos/zephyr