drvAsynPowerPMACPort.cpp: SSHDriver* is a pointer

Correct a printout: %p must be used instead of %d

While at this file, correct another printout where a size_t is printed with %d.
This does not work on a 64 bit machine, so convert the size_t into an
"unsigned long" and use "%lu" in the format string
(The conversion is a no-op under 64 bit Linux+gcc
 since both size_t and long use 64 bits)