arm: dts: k3-am625-phycore-som-binman: Enable tifs-rm-cfg

arm: dts: k3-am625-phycore-som-binman: Enable tifs-rm-cfg

Add rcfg_yaml_tifs node override to use tifs-rm-cfg.yaml instead of
the default rm-cfg.yaml for the phyCORE-AM62x SoM.

This enables binman to include the tifs-rm-cfg.yaml configuration
when building tiboot3 images, bringing the phyCORE-AM62x SoM in line
with other K3 devices that already use tifs-rm-cfg.yaml.

This builds on the tifs-rm-cfg file added earlier in this series.

Signed-off-by: Wadim Egorov <w.egorov@phytec.de>