- Fix broken in-OS sound in Windows after AudioDxe with some firmware (closes https://github.com/acidanthera/bugtracker/issues/1909)
 - Add Pcds for some AudioDxe code
 - Other minor updates
OcDebugLogLib:
 - Add DebugPrintDevicePathForHandle

Fixes https://github.com/acidanthera/bugtracker/issues/1908

AudioDxe: Improve documentation and logging of AudioOutMask, and change default value to 'output all'

AudioDxe: Properly address underlying issue of segfault in QEMU when QUIRK_QEMU_2 is not enabled; fix borked PollTimer test

 - DisconnectHda
 - AudioOutRange
 - Cirrus Logic (Apple) and QEMU fixes
 - Other fixes

references acidanthera/bugtracker#1888

Fixes broken builds for GCC5 and CLANG38 with RDTSC_CANARY_ENABLE

Some firmware implementations may provide an empty Memory Attributes
Table (NumberOfEntries is zero). Avoid calling OcUpdateDescriptors in
this case, as it will lead to division by zero.

This resolves boot failures due to #DE on XPS 15 9560 when Secure Boot
is enabled.

(Apparently changed requirements here since VMware 12 &/or Big Sur:
https://communities.vmware.com/t5/VMware-Fusion-Discussions/GDB-Stub-breakpoints-not-triggering-on-MacOS-guest/m-p/2850864 )