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/ov8856.c b/drivers/media/i2c/ov8856.c
index 4b6874d2a104..8cc973fff767 100644
--- a/drivers/media/i2c/ov8856.c
+++ b/drivers/media/i2c/ov8856.c
@@ -2274,7 +2274,7 @@ static int ov8856_get_hwcfg(struct ov8856 *ov8856, struct device *dev)
 		return ret;
 
 	if (!is_acpi_node(fwnode)) {
-		ov8856->xvclk = devm_clk_get(dev, "xvclk");
+		ov8856->xvclk = devm_v4l2_sensor_clk_get(dev, "xvclk");
 		if (IS_ERR(ov8856->xvclk)) {
 			dev_err_probe(dev, PTR_ERR(ov8856->xvclk),
 				      "could not get xvclk clock\n");