[rpcsx-os/orbis-kernel] random fixes

fix pipe
fix socketpair
fix bridge
fix evf_wait with timeout
fix umtx_op(0x17)
implement ipmi evf
stub sched_get_priority_max/min
stub sys_rtprio_thread
implement sys_yield
emit event on signal
stub ajm register/unregister ioctls
stub av_control ioctl
hack removal

orbis-kernel/include/orbis/thread/types.hpp

@@ -27,5 +27,7 @@ struct thr_param {
                    // following flags:
   ptr<rtprio> rtp; // Real-time scheduling priority for the new thread. May be
                    // NULL to inherit the priority from the creating	thread
+  ptr<char> name;
+  ptr<void> spare[2];
 };
 } // namespace orbis