x86: configs: Enable CONFIG_TEST_FPU for debug kernels

Vitaly Kuznetsovrequested to merge
vkuznets/kernel-ark:fpu_sefttest into os-build

Bugzilla: https://bugzilla.redhat.com/show_bug.cgi?id=1988384

CONFIG_TEST_FPU selftest is needed to test in-kernel FPU usage.

Signed-off-by: Vitaly Kuznetsov vkuznets@redhat.com

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