mpi3mr: Decrement per controller and per target IO counter post controller reset

[chandrakanth.patil_broadcom.com]

Summary

Post controller reset, If any device removal events arrive, and if
there are any outstanding IOs then the driver will unnecessarily wait
in the loop for 30 seconds before removing the device from the OS.

reset target outstanding IO counter and controller outstanding IO counter
and remove the redundant wait loop.