interconnect: qcom: osm-l3: Add per-core EPSS L3 support

The EPSS instance in e.g. SM8350 and SC8280XP has per-core L3 voting
enabled. In this configuration, the "shared" vote is done using the
REG_L3_VOTE register instead of PERF_STATE.

Rename epss_l3 to clarify that it's affecting the PERF_STATE register
and add a new L3_VOTE description. Given platform lineage it's assumed
that the L3_VOTE-based case will be the predominant one, so use this for
a new generic qcom,epss-l3 compatible.

While adding the EPSS generic, also add qcom,osm-l3.

Signed-off-by: Bjorn Andersson <[email protected]>
Tested-by: Steev Klimaszewski <[email protected]>
Reviewed-by: Sibi Sankar <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Georgi Djakov <[email protected]>

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