The I2C2 uses different pinmux on AV96, use correct pinmux and also add comments about the I2C being present on the "low-speed" expansion connector X6. Signed-off-by: Marek Vasut <marex@denx.de> Cc: Patrick Delaunay <patrick.delaunay@st.com> Cc: Patrice Chotard <patrice.chotard@st.com> Reviewed-by: Patrick Delaunay <patrick.delaunay@st.com>