platform/x86: ISST: Add SST-PP support via TPMI

This Intel Speed Select Technology - Performance Profile (SST-PP) feature
introduces a mechanism that allows multiple optimized performance profiles
per system. Each profile defines a set of CPUs that need to be online and
rest offline to sustain a guaranteed base frequency.

Five new IOCTLs are added:
ISST_IF_PERF_LEVELS : Get number of performance levels
ISST_IF_PERF_SET_LEVEL : Set to a new performance level
ISST_IF_PERF_SET_FEATURE : Activate SST-BF/SST-TF for a performance level
ISST_IF_GET_PERF_LEVEL_INFO : Get parameters for a performance level
ISST_IF_GET_PERF_LEVEL_CPU_MASK : Get CPU mask for a performance level

Once an instance is identified, read or write from correct MMIO
offset for a given field as defined in the specification.

For details on SST PP operations using intel-speed-selet utility,
refer to:
Documentation/admin-guide/pm/intel-speed-select.rst
under the kernel documentation

Signed-off-by: Srinivas Pandruvada <[email protected]>
Reviewed-by: Zhang Rui <[email protected]>
Tested-by: Pragya Tanwar <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Hans de Goede <[email protected]>

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