Keep mxcsr and mxcsr_mask across the fake init in process_read_fpregs. ok deraadt@
Keep mxcsr and mxcsr_mask across the fake init in process_read_fpregs.
ok deraadt@

orumin/openbsd-efivars,orumin/openbsd-efivars,orumin/openbsd-efivars,orumin/openbsd-efivars