sparc64: Cleans up PRIQ error and debugging messages.

sparc64: Cleans up PRIQ error and debugging messages.

Given that the lowest level arch dependent interrupt routines cannot actually
propagate any error back to the calling driver in the case of irq
request/enable/disable and setting affinity, PRIQ error messages need to
communicate failures in a more traceable way. The original error messages which
were more for internal debugging than regular usage have also been improved as
well as made controllable via a command line parameter priq=dbg.

Orabug: 24010412

Signed-off-by: Chris Hyser <chris.hyser@oracle.com>
(cherry picked from commit 89c31d4dd664cd2edc1f6d14aa62c75acfb0d172)
Signed-off-by: Allen Pais <allen.pais@oracle.com>