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x86/e820: fix the mishandled e820 map for kexec/kdump

Baoquan He requested to merge baoquan_he/centos-stream-9:RHEL-35785 into main 
JIRA: https://issues.redhat.com/browse/RHEL-35785

Upstream Status: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git

Mechanism setup_data is used by kexec/kdump to pass memory information to 2nd kernel.
However there are some mishandling for it when parsing and handling it. These two patches
are back ported to fix it.

Signed-off-by: Baoquan He <bhe@redhat.com>

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