Change PQI_HZ to HZ.

PQI_HZ macro was set to 1000 when HZ value is less than 1000.  By default,
PQI_HZ will result into a delay of 10 seconds(for kernel, which has HZ =
100). So in this case when firmware raises an event, rescan worker will be
scheduled after a delay of (10 x PQI_HZ) = 100 seconds instead of 10
seconds.

Also driver uses PQI_HZ at many instances, which might result in some other
issues with respect to delay.

Link: https://lore.kernel.org/r/164375210825.440833.15510172447583227486.stgit@brunhilda.pdev.netReviewed-by: Kevin Barnett <kevin.barnett@microchip.com>
Reviewed-by: Mike McGowen <mike.mcgowen@microchip.com>
Reviewed-by: Scott Benesh <scott.benesh@microchip.com>
Reviewed-by: Scott Teel <scott.teel@microchip.com>
Signed-off-by: Balsundar P <balsundar.p@microchip.com>
Signed-off-by: Don Brace <don.brace@microchip.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>