• Add XHAL XSNOR-MFS L4R validation fixes
• Add STM32U0/U3 XHAL ports and multi-demo targets
• Add STM32C0/G0 XHAL ports and multi-demo targets
• Add XHAL XSNOR MFS test for STM32L4R9
• Add initial STM32L4+ support to XHAL
• Add STM32H7 XHAL bringup and xmcuconf updaters
• XHAL: document XSNOR reset and RDID timing from datasheets