Store the per-core implementer/part/arch/variant/revision lists
space-separated (no embedded newlines, which also cleans up JSON and
prometheus output) and dedup them for the human-readable display, so
homogeneous systems show e.g. "0x41" instead of repeating it per core.
Add detection for three speculation/security-relevant ARM64 errata
families that are tracked by vendor erratum IDs rather than CVEs: Speculative
AT TLB corruption (1165522/1319367/1319537/1530923), speculative unprivileged
load (2966298/3117295), and MSR SSBS not self-synchronizing (3194386 and
siblings). Reserves a new CVE-0001-NNNN placeholder range for vendor errata
and adds a --errata <number> selector alongside --variant/--cve.
CPU affection is determined per-core from (implementer, part, variant,
revision) tuples read from /proc/cpuinfo, matching the kernel's MIDR ranges
(including Kryo4xx Silver for erratum 1530923). Kernel mitigation detection
uses the erratum-specific CONFIG_ARM64_ERRATUM_NNNN symbols, kernel image
descriptor strings, and dmesg output (no sysfs for these)
Stéphane Lesimple