kernel.spec: replace '=' with space in argument of kernel-install

JIRA: https://issues.redhat.com/browse/RHEL-114361

Upstream Status: RHEL only

Commit in Fixes has a flaw that kernel-install in systemd of RHEL 9
only takes argument deliminated by space not '='.

Fixes: 3a10a14 ("kernel.spec: add '-e' option to %preun for kernel-core and kernel-uki-virt")
Signed-off-by: Li Tian <litian@redhat.com>

Author: litian1992

redhat/kernel.spec.template

@@ -3295,7 +3295,7 @@ touch %{_localstatedir}/lib/rpm-state/%{name}/installing_core_%{KVERREL}%{?-v:+%
 %{expand:%%preun %{?-v:%{-v*}-}%{!?-u*:core}%{?-u*:uki-%{-u*}}}\
 entry_type=""\
 %{-e: \
-/bin/kernel-install --help|grep -q -- '--entry-type=' &&\
+/bin/kernel-install --help|grep -q -- '--entry-type ' &&\
     entry_type="--entry-type %{!?-u:type1}%{?-u:type2}" \
 }\
 /bin/kernel-install remove %{KVERREL}%{?-v:+%{-v*}} $entry_type || exit $?\