Merge: spec: fix spec warning for /usr/include/ynl

MR: https://gitlab.com/redhat/centos-stream/src/kernel/centos-stream-10/-/merge_requests/1159

JIRA: https://issues.redhat.com/browse/RHEL-101712

With the combination of build options "--without realtime --without debug
 --without debuginfo --without ynl --without doc" in ELN, build produces a
warning:

RPM build warnings:
File not found: /builddir/build/BUILD/kernel-6.16.0-build/BUILDROOT/usr/include/ynl

Put the exclude behind %{with_ynl} to avoid the warning.

Signed-off-by: Alexandra Hájková <ahajkova@redhat.com>

Approved-by: Jan Stancek <jstancek@redhat.com>
Approved-by: Patrick Talbert <ptalbert@redhat.com>
Approved-by: CKI KWF Bot <cki-ci-bot+kwf-gitlab-com@redhat.com>

Merged-by: CKI GitLab Kmaint Pipeline Bot <26919896-cki-kmaint-pipeline-bot@users.noreply.gitlab.com>

Author: CKI KWF Bot

redhat/kernel.spec.template

@@ -3934,8 +3934,10 @@ fi\
 %files headers
 /usr/include/*
 %exclude %{_includedir}/cpufreq.h
+%if %{with_ynl}
 %exclude %{_includedir}/ynl
 %endif
+%endif
 
 %if %{with_cross_headers}
 %files cross-headers