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.

Approved by: re (gjb)
MFC after: 3 days
PR: 252971

(cherry picked from commit 1cf282363101f5d99b1dadfb0d3250bbe6f482a5)
(cherry picked from commit 944f4316558055a2bb6481048386e94b523ab48c)