perf vendor events s390: Add common metrics

Add 3 metrics for s390 machines:

- Cycles per instruction: Amount of CPU cycles used per instructions,
  named cpi.
- Problem state ratio: Ratio of instructions executed in problem state
  compared to total number of instructions, named prbstate.
- Level one instruction and data cache misses per 100 instructions,
  named l1mp.

For details about the formulas see this documentation:
https://www.ibm.com/support/pages/system/files/inline-files/CPU%20MF%20Formulas%20including%20z16%20-%20May%202022_1.pdf

Output after:

  # ./perf stat -M cpi -- dd if=/dev/zero of=/dev/null bs=1M count=10K
  10240+0 records in
  10240+0 records out
  10737418240 bytes (11 GB, 10 GiB) copied, 1.30151 s, 8.2 GB/s

  Performance counter stats for 'dd if=/dev/zero of=/dev/null .....':

    6,779,778,802      CPU_CYCLES              #     1.96 cpi
    3,461,975,090      INSTRUCTIONS

    1.306873021 seconds time elapsed

    0.001034000 seconds user
    1.305677000 seconds sys
  #

Signed-off-by: Thomas Richter <[email protected]>
Acked-by: Ian Rogers <[email protected]>
Acked-By: Sumanth Korikkar <[email protected]>
Cc: Heiko Carstens <[email protected]>
Cc: Sven Schnelle <[email protected]>
Cc: Vasily Gorbik <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Arnaldo Carvalho de Melo <[email protected]>

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