kdump.sysconfig.s390: Remove "prot_virt" from kdump kernel cmdline
    
    Resolves: bz1979879
    Upstream: Fedora
    Conflict: None
    
    commit 914a856c66410099d0e8747e900d097624a3eb60
    Author: Philipp Rudo <prudo@redhat.com>
    Date:   Fri Jul 16 10:34:35 2021 +0200
    
        kdump.sysconfig.s390: Remove "prot_virt" from kdump kernel cmdline
    
        "prot_virt" enables the kernel to run Secure Execution virtual machines
        on s390. These virtual machines are isolated from the hypervisor and
        thus protected against tampering by a malicious host. Enabling
        "prot_virt" requires a minimum of ~2.5GB memory which exceeds what is
        typically reserved for the crashkernel. Thus remove "prot_virt" from the
        command line for the 2nd kernel to prevent it to run out-of-memory.
    
        For more discussions about this, see:
        https://lists.fedoraproject.org/archives/list/kexec@lists.fedoraproject.org/thread/QSRRNV4ALKXUJC2VM3US4Z2NSQRHVMXB/
    
        Signed-off-by: Philipp Rudo <prudo@redhat.com>
        Acked-by: Baoquan He <bhe@redhat.com>
    
    Signed-off-by: Philipp Rudo <prudo@redhat.com>