feat(st-gpio): add set GPIO config API

Add get and set GPIO level from bank and pin value.
Add functions to set a pad in GPIO configuration
and to apply some settings.

Change-Id: I5e3acb5c95cd03f3e130e1a263b221b956cb3c8d
Signed-off-by: Pascal Paillet <p.paillet@st.com>
2 files changed