arm64: rpi4: firmware: Attach at BUS_PASS_BUS + BUS_PASS_ORDER_LATE

The node have now a compatible with simple-mfd so we need to attach
at the same pass so the specific driver will be used.

MFC after: 3 days
PR: 252971

(cherry picked from commit 1cf282363101f5d99b1dadfb0d3250bbe6f482a5)