configs: stm32mp1: enable the fastboot oem command format

Enable the fastboot oem command format and set the variable
"partitions" with default eMMC partitions list.

Signed-off-by: Patrick Delaunay <patrick.delaunay@st.com>
Signed-off-by: Jean-Philippe ROMAIN <jean-philippe.romain@st.com>
Reviewed-by: Patrice Chotard <patrice.chotard@st.com>
3 files changed