Fixes issue #304 with modprobe being missed by the [modules] plugin.

See: https://github.com/redhat-performance/tuned/pull/305

diff --git a/tuned.spec b/tuned.spec
index f28e7b58..2a3fc6bf 100644
--- a/tuned.spec
+++ b/tuned.spec
@@ -88,6 +88,7 @@ Requires: util-linux, dbus, polkit
 Recommends: hdparm
 Recommends: kernel-tools
 Recommends: python-dmidecode
+Recommends: kmod
 %endif
 %if 0%{?rhel} > 7
 Requires: python3-syspurpose
