feat(stm32mp1): add helper to enable high speed mode in low voltage

This new function is used to fill the register(s) responsible to enable
high speed mode for pad in low voltage (<2.7V).

Change-Id: Ib8abc6628bdf51bbe6a866bc6a9bcdeb4a84a8f4
Signed-off-by: Yann Gautier <yann.gautier@st.com>
1 file changed