ASoC: SOF: Intel: hda-codec: use GPL-2.0-only license

All the HDAudio codec handling is completely specific to Linux and
completely dependency on GPL2.0 code, specifically the snd_hdac_
library.

There was no intention to have a dual-license for this code, this was
an oversight that needs to be corrected. Update the SPDX and
EXPORT_SYMBOL information, no functionality change otherwise.
Signed-off-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Reviewed-by: Rander Wang <rander.wang@intel.com>
Reviewed-by: Bard Liao <yung-chuan.liao@linux.intel.com>
Reviewed-by: Péter Ujfalusi <peter.ujfalusi@linux.intel.com>
Reviewed-by: Ranjani Sridharan <ranjani.sridharan@linux.intel.com>
Link: https://lore.kernel.org/r/20221027193540.259520-21-pierre-louis.bossart@linux.intel.comSigned-off-by: Mark Brown <broonie@kernel.org>

sound/soc/sof/intel/hda-codec.c

-// SPDX-License-Identifier: (GPL-2.0-only OR BSD-3-Clause)
-//
-// This file is provided under a dual BSD/GPLv2 license.  When using or
-// redistributing this file, you may do so under either license.
+// SPDX-License-Identifier: GPL-2.0-only
 //
 // Copyright(c) 2018 Intel Corporation. All rights reserved.
 //
@@ -83,7 +80,7 @@ void hda_codec_jack_wake_enable(struct snd_sof_dev *sdev, bool enable)
 
 	snd_hdac_chip_updatew(bus, WAKEEN, STATESTS_INT_MASK, mask);
 }
-EXPORT_SYMBOL_NS(hda_codec_jack_wake_enable, SND_SOC_SOF_HDA_AUDIO_CODEC);
+EXPORT_SYMBOL_NS_GPL(hda_codec_jack_wake_enable, SND_SOC_SOF_HDA_AUDIO_CODEC);
 
 /* check jack status after resuming from suspend mode */
 void hda_codec_jack_check(struct snd_sof_dev *sdev)
@@ -99,7 +96,7 @@ void hda_codec_jack_check(struct snd_sof_dev *sdev)
 		if (codec->jacktbl.used)
 			pm_request_resume(&codec->core.dev);
 }
-EXPORT_SYMBOL_NS(hda_codec_jack_check, SND_SOC_SOF_HDA_AUDIO_CODEC);
+EXPORT_SYMBOL_NS_GPL(hda_codec_jack_check, SND_SOC_SOF_HDA_AUDIO_CODEC);
 
 #if IS_ENABLED(CONFIG_SND_HDA_GENERIC)
 #define is_generic_config(bus) \
@@ -224,7 +221,7 @@ void hda_codec_probe_bus(struct snd_sof_dev *sdev)
 		}
 	}
 }
-EXPORT_SYMBOL_NS(hda_codec_probe_bus, SND_SOC_SOF_HDA_AUDIO_CODEC);
+EXPORT_SYMBOL_NS_GPL(hda_codec_probe_bus, SND_SOC_SOF_HDA_AUDIO_CODEC);
 
 void hda_codec_check_for_state_change(struct snd_sof_dev *sdev)
 {
@@ -237,7 +234,7 @@ void hda_codec_check_for_state_change(struct snd_sof_dev *sdev)
 		snd_hdac_chip_writew(bus, STATESTS, codec_mask);
 	}
 }
-EXPORT_SYMBOL_NS(hda_codec_check_for_state_change, SND_SOC_SOF_HDA_AUDIO_CODEC);
+EXPORT_SYMBOL_NS_GPL(hda_codec_check_for_state_change, SND_SOC_SOF_HDA_AUDIO_CODEC);
 
 void hda_codec_detect_mask(struct snd_sof_dev *sdev)
 {
@@ -361,7 +358,7 @@ void hda_codec_i915_display_power(struct snd_sof_dev *sdev, bool enable)
 		snd_hdac_display_power(bus, HDA_CODEC_IDX_CONTROLLER, enable);
 	}
 }
-EXPORT_SYMBOL_NS(hda_codec_i915_display_power, SND_SOC_SOF_HDA_AUDIO_CODEC_I915);
+EXPORT_SYMBOL_NS_GPL(hda_codec_i915_display_power, SND_SOC_SOF_HDA_AUDIO_CODEC_I915);
 
 int hda_codec_i915_init(struct snd_sof_dev *sdev)
 {
@@ -378,7 +375,7 @@ int hda_codec_i915_init(struct snd_sof_dev *sdev)
 
 	return 0;
 }
-EXPORT_SYMBOL_NS(hda_codec_i915_init, SND_SOC_SOF_HDA_AUDIO_CODEC_I915);
+EXPORT_SYMBOL_NS_GPL(hda_codec_i915_init, SND_SOC_SOF_HDA_AUDIO_CODEC_I915);
 
 int hda_codec_i915_exit(struct snd_sof_dev *sdev)
 {
@@ -392,7 +389,7 @@ int hda_codec_i915_exit(struct snd_sof_dev *sdev)
 
 	return snd_hdac_i915_exit(bus);
 }
-EXPORT_SYMBOL_NS(hda_codec_i915_exit, SND_SOC_SOF_HDA_AUDIO_CODEC_I915);
+EXPORT_SYMBOL_NS_GPL(hda_codec_i915_exit, SND_SOC_SOF_HDA_AUDIO_CODEC_I915);
 
 #endif