arch/x86/kernel/setup.c: fix rh_check_supported

Tomas Henzlrequested to merge
thenzl/kernel-ark:71452 into os-build

When in kdump we don't need this messaging and the kernel is limited to a single cpu single cpu by default which causes false messaging. Fix this by inverting the kdump boot test.

Signed-off-by: Tomas Henzl thenzl@redhat.com

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