refactor(plat/st): add stm32image_io_setup

Add a generic function to setup the stm32image IO.

Change-Id: I0f7cf4a6030605037643f3119b809e0319d926af
Signed-off-by: Patrick Delaunay <patrick.delaunay@st.com>
Signed-off-by: Yann Gautier <yann.gautier@foss.st.com>
1 file changed