e00f0d7817
Additions cross-referenced with Linux 7.1 drivers/base/firmware_loader/: - BuiltinFirmware + BuiltinRegistry: compile-time embedded firmware (main.c:755-768 firmware_request_builtin_buf()) - LoadStats: hits/misses/timeouts/cache_hits/latency tracking (fw_cache stats pattern) - Retry with exponential backoff: configurable retries+delay (_request_firmware() retry loop) - Configurable max firmware bytes (default 256MB) - SHA-512 verification toggle - Removed unnecessary #[allow(dead_code)] on used public API FirmwareRegistry now supports: builtins, stats, retry, size limits, sha512 verify — all gated behind builder-pattern with_* methods.