This commit creates new file to manage security features and supported OPP on STM32MP15xF SOCs. On STM32MP15xY, "Y" gives information: -Y = A means no cryp IP and no secure boot + A7-CPU@650MHz. -Y = C means cryp IP + optee + secure boot + A7-CPU@650MHz. -Y = D means no cryp IP and no secure boot + A7-CPU@800MHz. -Y = F means cryp IP + optee + secure boot + A7-CPU@800MHz. It fullfills the initial STM32MP15x SoC diversity introduced by commit 0eda69b6c5f9 ("ARM: dts: stm32: Manage security diversity for STM32M15x SOCs"). Signed-off-by: Alexandre Torgue <alexandre.torgue@foss.st.com> Signed-off-by: Amelie Delaunay <amelie.delaunay@foss.st.com> Link: https://lore.kernel.org/r/20250603-stm32mp157f-dk2-v2-1-5be0854a9299@foss.st.com Signed-off-by: Alexandre Torgue <alexandre.torgue@foss.st.com>