feat(st): introduce SoC family compilation switch

add STM32MP1X and STM3MP2X compilation switch to replace
#if STM32MP21 || STM32MP23 || STM32MP25 for MP2 SoCs and
#if STM32MP13 || STM32MP15 for MP1 SoCs.

This will avoid to forget to modify all these files when a new SoC is
introduced.

Change-Id: Ib984b22a19e08af5bc1b62fe2032f10240ec9122
Signed-off-by: Maxime Méré <maxime.mere@foss.st.com>
6 files changed