Processor frequency in SMBIOS

When I was developing the Omni infrastructure provider for Oxide it was noted in https://github.com/siderolabs/omni/discussions/1633#discussioncomment-14607184 that Oxide SMBIOS data doesn't contain processor frequency.

This wasn't a blocker but it was surprising since my local testing showed the processor frequency in Omni and when I moved testing to Oxide I no longer saw processor frequency, making me think that I missed something during implementation.

This issue is to add processor frequency information to SMBIOS. See the Unknown, Not Provided, and Not Specified information below.

$ sudo dmidecode --type processor
# dmidecode 3.5
Getting SMBIOS data from sysfs.
SMBIOS 2.7 present.

Handle 0x0300, DMI type 4, 42 bytes
Processor Information
        Socket Designation: Not Specified
        Type: Central Processor
        Family: Zen
        Manufacturer: Advanced Micro Devices, Inc.
        ID: 11 0F A0 00 FF FB 8B 17
        Signature: Family 25, Model 1, Stepping 1
        Flags:
                FPU (Floating-point unit on-chip)
                VME (Virtual mode extension)
                DE (Debugging extension)
                PSE (Page size extension)
                TSC (Time stamp counter)
                MSR (Model specific registers)
                PAE (Physical address extension)
                MCE (Machine check exception)
                CX8 (CMPXCHG8 instruction supported)
                APIC (On-chip APIC hardware supported)
                SEP (Fast system call)
                MTRR (Memory type range registers)
                PGE (Page global enable)
                MCA (Machine check architecture)
                CMOV (Conditional move instruction supported)
                PAT (Page attribute table)
                PSE-36 (36-bit page size extension)
                CLFSH (CLFLUSH instruction supported)
                MMX (MMX technology supported)
                FXSR (FXSAVE and FXSTOR instructions supported)
                SSE (Streaming SIMD extensions)
                SSE2 (Streaming SIMD extensions 2)
                HTT (Multi-threading)
        Version: AMD EPYC 7713P 64-Core Processor
        Voltage: Unknown
        External Clock: Unknown
        Max Speed: Unknown
        Current Speed: Unknown
        Status: Populated, Enabled
        Upgrade: Unknown
        L1 Cache Handle: Not Provided
        L2 Cache Handle: Not Provided
        L3 Cache Handle: Not Provided
        Serial Number: Not Specified
        Asset Tag: Not Specified
        Part Number: Not Specified
        Core Count: 4
        Core Enabled: 4
        Thread Count: 4
        Characteristics:
                64-bit capable
                Multi-Core

Start by locating the SMBIOS processor information implementation in propolis and compare its generated data with the dmidecode output in this issue. Use the linked Omni discussion for context, then verify that the processor frequency fields are populated on Oxide instead of reporting Unknown.