RIFSC is a firewall controller. Add "st,stm32mp25-rifsc" compatible and
reference RIFSC as an access-control-provider. Keep "simple-bus"
compatible backward compatibility.
Signed-off-by: Gatien Chevallier <gatien.chevallier@foss.st.com>
Signed-off-by: Alexandre Torgue <alexandre.torgue@foss.st.com>