devm_clk_get() fails on ACPI-based platforms, where firmware does not
provide a direct reference to the clock producer.

Replace devm_clk_get() with the new v4l2 helper
devm_v4l2_sensor_clk_get() that works on both DT- and ACPI-based
platforms to retrieve a reference to the clock producer from firmware.

Signed-off-by: Mehdi Djait <mehdi.djait@linux.intel.com>

diff --git a/drivers/media/i2c/mt9p031.c b/drivers/media/i2c/mt9p031.c
index 4ef5fb06131d..b48866831a7a 100644
--- a/drivers/media/i2c/mt9p031.c
+++ b/drivers/media/i2c/mt9p031.c
@@ -233,7 +233,7 @@ static int mt9p031_clk_setup(struct mt9p031 *mt9p031)
 	unsigned long ext_freq;
 	int ret;
 
-	mt9p031->clk = devm_clk_get(&client->dev, NULL);
+	mt9p031->clk = devm_v4l2_sensor_clk_get(&client->dev, NULL);
 	if (IS_ERR(mt9p031->clk))
 		return PTR_ERR(mt9p031->clk);