feat(stm32mp2): display CPU info

Print information about CPU type, package and revision.
SoC revision ID of MP2 family are defined with the OTP 102.

Signed-off-by: Maxime Méré <maxime.mere@foss.st.com>
Signed-off-by: Yann Gautier <yann.gautier@st.com>
Change-Id: I14a95c8a7cb9b06ce32c2e592ae69a1741067e8d
4 files changed