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The SDM845 comes with few instances of Bandwidth Monitor.  The already
supported one monitors traffic between CPU and Last Level Cache
Controller (LLCC) and in downstream sources is called BWMON v4 (or v4 of
register layout).

SDM845 also has also BWMON instance measuring traffic between LLCC and
memory with different register layout: called v5.

Cc: Rajendra Nayak <quic_rjendra@quicinc.com>
Cc: Sibi Sankar <quic_sibis@quicinc.com>
Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Tested-by: Steev Klimaszewski <steev@kali.org>
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
Link: https://lore.kernel.org/r/20220728113748.170548-12-krzysztof.kozlowski@linaro.org