drm: bridge: dw-hdmi: Constify dw_hdmi_i2s_ops

The only usage of dw_hdmi_i2s_ops is to assign its address to the ops
field in the hdmi_codec_pdata struct, which is a const pointer. Make it
const to allow the compiler to put it in read-only memory.
Signed-off-by: Rikard Falkeborn <rikard.falkeborn@gmail.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Link: https://patchwork.freedesktop.org/patch/msgid/20201004200653.14702-1-rikard.falkeborn@gmail.com

drivers/gpu/drm/bridge/synopsys/dw-hdmi-i2s-audio.c

@@ -170,7 +170,7 @@ static int dw_hdmi_i2s_hook_plugged_cb(struct device *dev, void *data,
 	return dw_hdmi_set_plugged_cb(hdmi, fn, codec_dev);
 }
 
-static struct hdmi_codec_ops dw_hdmi_i2s_ops = {
+static const struct hdmi_codec_ops dw_hdmi_i2s_ops = {
 	.hw_params	= dw_hdmi_i2s_hw_params,
 	.audio_startup  = dw_hdmi_i2s_audio_startup,
 	.audio_shutdown	= dw_hdmi_i2s_audio_shutdown,