MFC 204090: Fix mptutil's method for locating disk devices attached to a specific mpt(4) controller.  Previously, the code assumed that multiple match patterns provided to an XPT_DEV_MATCH request were ANDed together. Instead, they are ORed.  Instead, to match peripherals for a specific bus, one query needs to be performed to lookup the path ID of the bus.  A second query can then be performed matching peripherals attached to that path. This approach also makes the code a bit cleaner as the returned match results do not mix buses and perphierals.
MFC 204090:
Fix mptutil's method for locating disk devices attached to a specific
mpt(4) controller.  Previously, the code assumed that multiple match
patterns provided to an XPT_DEV_MATCH request were ANDed together.
Instead, they are ORed.  Instead, to match peripherals for a specific bus,
one query needs to be performed to lookup the path ID of the bus.  A second
query can then be performed matching peripherals attached to that path.
This approach also makes the code a bit cleaner as the returned match
results do not mix buses and perphierals.

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