soc: stm32l5: Add spi 2 & 3 on devicetree
soc: stm32l5: Add spi 2 & 3 on devicetree

It adds spi2 & spi3 support on stm32l5 boards

Signed-off-by: Luc Viala <000d2727ec2fa6600bf947816553f569db96021b@zaack.io>

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