tt-bh-win (Blackhole Windows fan driver)

A minimal Windows KMDF driver that stops a Blackhole PCIe card's fan running at 100% on Windows hosts, where no in-box driver exists. On `D0Entry` it maps BAR0 (ported from `blackhole_init()` in tt-kmd), programs a kernel TLB window to the ARC NOC node, and sends the `ASIC_STATE0` (0xA0) ARC message that hands fan control to the on-die firmware; it also parses the telemetry table for debug output. It has no compute path and no user-mode interface. Confirmed on p100a and expected to work on p150a/p150b; builds with Visual Studio and the WDK and needs test signing to install.