community/qemu: upgrade to 9.1.0
remove nios2 subpackage, removed upstream remove linux-user-Handle-short-reads-in-mmap_h_gt_g.patch, applied upstream remove last hunk from guest-agent-shutdown.patch, not applicable and not needed with this version
remove nios2 subpackage, removed upstream remove linux-user-Handle-short-reads-in-mmap_h_gt_g.patch, applied upstream remove last hunk from guest-agent-shutdown.patch, not applicable and not needed with this version