drm/msm/hdmi: don't take extra reference on PHY device

The of_find_device_by_node() already increments the device's usage
count, so there is no need to increment it again using get_device().
Drop this extra get_device().

Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Reviewed-by: Abhinav Kumar <quic_abhinavk@quicinc.com>
Patchwork: https://patchwork.freedesktop.org/patch/499648/
Link: https://lore.kernel.org/r/20220826093927.851597-5-dmitry.baryshkov@linaro.org
Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>

Author: lumag

drivers/gpu/drm/msm/hdmi/hdmi.c

@@ -106,7 +106,7 @@ static int msm_hdmi_get_phy(struct hdmi *hdmi)
 		return -EPROBE_DEFER;
 	}
 
-	hdmi->phy_dev = get_device(&phy_pdev->dev);
+	hdmi->phy_dev = &phy_pdev->dev;
 
 	return 0;
 }