mlxbf-pmc: Fix crspace event offsets

[Shravan Kumar Ramani]

SRU Justification:

[Impact]
Currently, the offsets calculated for programming crspace type events on BlueField-3 are incorrect and this leads to a mismatch of counter numbers between the driver and actual HW where, for example, event2 in the driver is actually event4 in HW.

[Fix]
Fix the offset calculation for programming crspace events.

[Test Case]
On a BlueField-3 platform, program any valid event number to the event sysfs and check that the corresponding counter value increments.

[Regression Potential]
This is a bug fix and the regression potential can be considered minimal.

[Ubuntu Kernel Bot (ubuntu-kernel-bot)]

This bug is awaiting verification that the linux-bluefield/5.15.0-1032.34 kernel in -proposed solves the problem. Please test the kernel and update this bug with the results. If the problem is solved, change the tag 'verification-needed-jammy-linux-bluefield' to 'verification-done-jammy-linux-bluefield'. If the problem still exists, change the tag 'verification-needed-jammy-linux-bluefield' to 'verification-failed-jammy-linux-bluefield'.

If verification is not done by 5 working days from today, this fix will be dropped from the source code, and this bug will be closed.

See https://wiki.ubuntu.com/Testing/EnableProposed for documentation how to enable and use -proposed. Thank you!