This splits up the clock configs.
It allows CPU_FAM based file sourcing and also common CPU_FAMs.
The dependancies are also included in wildcards would be used for the CPU_FAM macro.
This should be much more readable.
This also takes into account the HSE speeds in order to match the make/header resolution.
Some hidden symbols were added to make sorting many CPU_SERIES dependencies easier.
Note that Kconfig.models was not generated with gen_kconfig.py tool
due to lack of ProductsList.xlsx file for STM32MP1 family.
Signed-off-by: Gilles DOFFE <gilles.doffe@savoirfairelinux.com>
