The HZ_PER_KHZ macro definition is duplicated in different subsystems.

The macro now exists in include/linux/units.h, make use of it and
remove all the duplicated ones.

Signed-off-by: Daniel Lezcano <redacted>
---
 drivers/devfreq/devfreq.c         | 2 +-
 drivers/iio/light/as73211.c       | 3 +--
 drivers/thermal/devfreq_cooling.c | 2 +-
 3 files changed, 3 insertions(+), 4 deletions(-)

diff --git a/drivers/devfreq/devfreq.c b/drivers/devfreq/devfreq.c
index 6aa10de792b3..4c636c336ace 100644
--- a/drivers/devfreq/devfreq.c
+++ b/drivers/devfreq/devfreq.c

@@ -26,6 +26,7 @@
 #include <linux/hrtimer.h>
 #include <linux/of.h>
 #include <linux/pm_qos.h>
+#include <linux/units.h>
 #include "governor.h"
 
 #define CREATE_TRACE_POINTS

@@ -33,7 +34,6 @@
 
 #define IS_SUPPORTED_FLAG(f, name) ((f & DEVFREQ_GOV_FLAG_##name) ? true : false)
 #define IS_SUPPORTED_ATTR(f, name) ((f & DEVFREQ_GOV_ATTR_##name) ? true : false)
-#define HZ_PER_KHZ	1000
 
 static struct class *devfreq_class;
 static struct dentry *devfreq_debugfs;

diff --git a/drivers/iio/light/as73211.c b/drivers/iio/light/as73211.c
index 7b32dfaee9b3..3ba2378df3dd 100644
--- a/drivers/iio/light/as73211.c
+++ b/drivers/iio/light/as73211.c

@@ -24,8 +24,7 @@
 #include <linux/module.h>
 #include <linux/mutex.h>
 #include <linux/pm.h>
-
-#define HZ_PER_KHZ 1000
+#include <linux/units.h>
 
 #define AS73211_DRV_NAME "as73211"
 

diff --git a/drivers/thermal/devfreq_cooling.c b/drivers/thermal/devfreq_cooling.c
index fed3121ff2a1..fa5b8b0c7604 100644
--- a/drivers/thermal/devfreq_cooling.c
+++ b/drivers/thermal/devfreq_cooling.c

@@ -19,10 +19,10 @@
 #include <linux/pm_opp.h>
 #include <linux/pm_qos.h>
 #include <linux/thermal.h>
+#include <linux/units.h>
 
 #include <trace/events/thermal.h>
 
-#define HZ_PER_KHZ		1000
 #define SCALE_ERROR_MITIGATION	100
 
 static DEFINE_IDA(devfreq_ida);