feat(st-clock): add STM32MP2 clock driver

This driver manages the clocks on STM32MP2 platforms.
It uses a dedicated RCC (Reset and Clock Control) peripheral.

Change-Id: I6ba2173e73222269a2dfca4c6897229276a150c0
Signed-off-by: Yann Gautier <yann.gautier@st.com>
Signed-off-by: Gabriel Fernandez <gabriel.fernandez@st.com>
5 files changed