[PATCH] drivers: iio: proximity: This patch fix the following checkpatch warning.

[Mohan Kumar]

As per Documentation/timers/timers-howto.txt Msleep < 20ms can sleep for
up to 20ms. so use usleep_range.

Signed-off-by: Mohan Kumar <mohankumar718@xxxxxxxxx>
---
 drivers/iio/proximity/mb1232.c | 2 +-
 drivers/iio/proximity/srf08.c  | 4 ++--
 2 files changed, 3 insertions(+), 3 deletions(-)

diff --git a/drivers/iio/proximity/mb1232.c b/drivers/iio/proximity/mb1232.c
index 166b3e6..74f7eae 100644
--- a/drivers/iio/proximity/mb1232.c
+++ b/drivers/iio/proximity/mb1232.c
@@ -81,7 +81,7 @@ static s16 mb1232_read_distance(struct mb1232_data *data)
 		}
 	} else {
 		/* use simple sleep if announce irq is not connected */
-		msleep(15);
+		usleep_range(15000, 20000);
 	}
 
 	ret = i2c_master_recv(client, (char *)&buf, sizeof(buf));
diff --git a/drivers/iio/proximity/srf08.c b/drivers/iio/proximity/srf08.c
index f2bf783..605a582 100644
--- a/drivers/iio/proximity/srf08.c
+++ b/drivers/iio/proximity/srf08.c
@@ -150,7 +150,7 @@ static int srf08_read_ranging(struct srf08_data *data)
 	 * polling for not more than 20 ms should be enough
 	 */
 	waittime = 1 + data->range_mm / 172;
-	msleep(waittime);
+	usleep_range(waittime * 1000, (waittime * 1000) + 2000);
 	for (i = 0; i < 4; i++) {
 		ret = i2c_smbus_read_byte_data(data->client,
 						SRF08_READ_SW_REVISION);
@@ -158,7 +158,7 @@ static int srf08_read_ranging(struct srf08_data *data)
 		/* check if a valid version number is read */
 		if (ret < 255 && ret > 0)
 			break;
-		msleep(5);
+		usleep_range(5000, 15000);
 	}
 
 	if (ret >= 255 || ret <= 0) {
-- 
2.7.4