configs: stm32mp1: enable fastboot support of eMMC boot partition

Activate fastboot support on boot partition for eMMC, mmc1 device
on STMicroelectronics board (EV1).

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