powercap: intel_rapl: Move MSR default settings into MSR interface driver

powercap: intel_rapl: Move MSR default settings into MSR interface driver

MSR-specific RAPL defaults differ from those used by the TPMI interface.
The MMIO and MSR interfaces shared the same rapl_defaults pointer in the
common driver, but MMIO does not require the CPU-specific variations
needed by MSR. Keeping these in the common driver adds unnecessary
complexity and MSR-specific initialization.

Move MSR defaults and CPU matching into the MSR interface driver.

Moves
-----
  * Move rapl_check_unit_atom(), set_floor_freq_atom(), and
    rapl_compute_time_window_atom() into intel_rapl_msr.c.
  * Move MSR unit-field GENMASK definitions and local constants.
  * Move all MSR-related rapl_defaults tables and the CPU-ID matching
    logic (rapl_ids[]) into the MSR driver.
  * Move iosf_mbi dependencies (floor-frequency control and related MBI
    register definitions) as they are MSR-platform specific.

Modifications
-------------
  * Replace the common driver's platform-device manual alloc/add sequence
    with platform_device_register_data() in the MSR driver to pass
    matching rapl_defaults as platform_data.
  * Update MSR driver probe to assign pdev->dev.platform_data to
    priv->defaults.
  * Update Atom helper functions to use rp->lead_cpu directly for MSR
    reads/writes instead of the generic get_rid().
  * Update Atom floor frequency logic to access defaults via the
    package private data pointer.
  * Convert MSR device creation from fs_initcall() to module_init().
    This preserves existing enumeration behavior as the driver was
    already using module_init().
  * Since rapl_ids need to exist after boot, remove __initconst
    specifier.

No functional changes are expected.

Co-developed-by: Zhang Rui <rui.zhang@intel.com>
Signed-off-by: Zhang Rui <rui.zhang@intel.com>
Signed-off-by: Kuppuswamy Sathyanarayanan <sathyanarayanan.kuppuswamy@linux.intel.com>
Acked-by: Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com>
Link: https://patch.msgid.link/20260331211950.3329932-2-sathyanarayanan.kuppuswamy@linux.intel.com
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>