[PATCH 6/6] x86/platform/uv/BAU: Implement uv4_wait_completion with read_status

UV4 does not employ a software-timeout as in previous generations so a new wait_completion routine without this logic is required. Certain completion statuses require the AUX status bit in addition to ERROR and BUSY. Add the read_status routine to construct the full completion status. Use

[PATCH 6/6] x86/platform/uv/BAU: Implement uv4_wait_completion with read_status

UV4 does not employ a software-timeout as in previous generations so a new wait_completion routine without this logic is required. Certain completion statuses require the AUX status bit in addition to ERROR and BUSY. Add the read_status routine to construct the full completion status. Use