Fixes tuned install dependencies on RHEL and CentOS 7.x for s390x

See: https://github.com/redhat-performance/tuned/pull/287

diff --git a/tuned.spec b/tuned.spec
index 60ed55cc..585d6b79 100644
--- a/tuned.spec
+++ b/tuned.spec
@@ -76,14 +76,13 @@ Recommends: python3-dmidecode
 # BuildRequires for 'make test'
 BuildRequires: dbus-python, pygobject3-base
 Requires: dbus-python, pygobject3-base
-%if 0%{?fedora} > 22 || 0%{?rhel} > 7
-Recommends: python-dmidecode
 %endif
-%endif
-Requires: virt-what, ethtool, gawk, hdparm
+Requires: virt-what, ethtool, gawk
 Requires: util-linux, dbus, polkit
 %if 0%{?fedora} > 22 || 0%{?rhel} > 7
+Recommends: hdparm
 Recommends: kernel-tools
+Recommends: python-dmidecode
 %endif
 %if 0%{?rhel} > 7
 Requires: python3-syspurpose
