Add Conflicts to prevent upgrades

Since _kernel_ is an `installonly` package, "upgrading" actually
installs a new version instead of replacing the installed version.
Because of this, the `Requires` tag of _gasket-driver_ does not prevent
upgrading to a new version of the kernel, as the requirement will still
be satisfied by the old version.

To fully prevent upgrading to a new kernel for which there is no
_gasket-driver_ (which would prevent Frigate from starting after the
reboot), we need to add a `Conflicts` tag.  This will not allow RPM to
install a version of _kernel_ newer than the one that matches
_gasket-driver_.

gasket-driver.spec

@@ -9,7 +9,7 @@
 
 Name:           gasket-driver
 Version:        0.0.git%{git_revision}
-Release:        2.k%{kernel_version}%{?dist}
+Release:        3.k%{kernel_version}%{?dist}
 Summary:        The Coral Gasket Driver allows usage of the Coral EdgeTPU on Linux systems
 
 License:        GPL-2.0
@@ -20,6 +20,7 @@ Patch1:         0002-Update-gasket_page_table.c-Fix-MODULE_IMPORT_NS.patch
 
 BuildRequires:  kernel-devel
 Requires:       kernel-core == %{kernel_version}
+Conflicts:      kernel-core > %{kernel_version}
 Requires(post): kmod
 
 %description