collectd: build cpufreq also for armvirt target

Enable collectd-mod-cpufreq also for armvirt to make it
available for ipq806x devices in LEDE buildbot snapshots.

LEDE phase2 buildbot for arm_cortex-a15_neon-vfpv4 that is
the package arch for ipq806x, uses armvirt SDK instead of
ipq806x SDK.

Signed-off-by: Hannu Nyman <hannu.nyman@iki.fi>

utils/collectd/Makefile

@@ -9,7 +9,7 @@ include $(TOPDIR)/rules.mk
 
 PKG_NAME:=collectd
 PKG_VERSION:=5.7.1
-PKG_RELEASE:=5
+PKG_RELEASE:=6
 
 PKG_SOURCE:=$(PKG_NAME)-$(PKG_VERSION).tar.bz2
 PKG_SOURCE_URL:=https://collectd.org/files/ \
@@ -319,7 +319,7 @@ $(eval $(call BuildPlugin,chrony,chrony status input,chrony,))
 $(eval $(call BuildPlugin,conntrack,connection tracking table size input,conntrack,))
 $(eval $(call BuildPlugin,contextswitch,context switch input,contextswitch,))
 $(eval $(call BuildPlugin,cpu,CPU input,cpu,))
-$(eval $(call BuildPlugin,cpufreq,CPU Freq input,cpufreq,@(TARGET_x86||TARGET_x86_64||TARGET_mvebu||TARGET_ipq806x))) # Only enable on x86 mvebu and ipq806x
+$(eval $(call BuildPlugin,cpufreq,CPU Freq input,cpufreq,@(TARGET_x86||TARGET_x86_64||TARGET_mvebu||TARGET_ipq806x||TARGET_armvirt))) # Only enable on x86 mvebu ipq806x armvirt
 $(eval $(call BuildPlugin,csv,CSV output,csv,))
 $(eval $(call BuildPlugin,curl,cURL input,curl,+PACKAGE_collectd-mod-curl:libcurl))
 #$(eval $(call BuildPlugin,dbi,relational database input,dbi,+PACKAGE_collectd-mod-dbi:libdbi))