asoc: update asoc and ipc drivers for kernel 5.15

Port drivers for Linux kernel 5.15(or after).

Remove unused headers that not present in the new kernel.
Update function interface matching API updates in the kernel.

Change-Id: Ibdffbe20c0b65b2ddda958d6a32c493696e15768
Signed-off-by: Junkai Cai <[email protected]>

asoc/codecs/wcd9xxx-soc-init.c

@@ -1,26 +1,18 @@
 // SPDX-License-Identifier: GPL-2.0-only
 /*
- * Copyright (c) 2017, The Linux Foundation. All rights reserved.
+ * Copyright (c) 2017, 2021 The Linux Foundation. All rights reserved.
  */
 
 #include <linux/module.h>
-#include <sound/wcd-dsp-mgr.h>
 #include "audio-ext-clk-up.h"
 
 static int __init wcd9xxx_soc_init(void)
 {
 	int ret = 0;
 
-	ret = wcd_dsp_mgr_init();
-	if (!ret) {
-		ret = audio_ref_clk_platform_init();
-		if (ret) {
-			pr_err("%s: init extclk fail: %d\n", __func__, ret);
-			wcd_dsp_mgr_exit();
-		}
-	} else {
-		pr_err("%s: init dsp mgr fail: %d\n", __func__, ret);
-	}
+	ret = audio_ref_clk_platform_init();
+	if (ret)
+		pr_err("%s: init extclk fail: %d\n", __func__, ret);
 
 	return ret;
 }
@@ -29,7 +21,6 @@ module_init(wcd9xxx_soc_init);
 static void __exit wcd9xxx_soc_exit(void)
 {
 	audio_ref_clk_platform_exit();
-	wcd_dsp_mgr_exit();
 }
 module_exit(wcd9xxx_soc_exit);
 

include/ipc/apr.h

@@ -1,12 +1,11 @@
 /* SPDX-License-Identifier: GPL-2.0-only */
 /*
- * Copyright (c) 2010-2017, 2019, 2020, The Linux Foundation. All rights reserved.
+ * Copyright (c) 2010-2017, 2019-2021, The Linux Foundation. All rights reserved.
  */
 #ifndef __APR_H_
 #define __APR_H_
 
 #include <linux/mutex.h>
-#include <soc/qcom/subsystem_notif.h>
 
 enum apr_subsys_state {
 	APR_SUBSYS_DOWN,

ipc/gpr-lite.c

@@ -355,7 +355,7 @@ static int gpr_device_probe(struct device *dev)
 	return adrv->probe(adev);
 }
 
-static int gpr_device_remove(struct device *dev)
+static void gpr_device_remove(struct device *dev)
 {
 	struct gpr_device *adev = to_gpr_device(dev);
 	struct gpr_driver *adrv;
@@ -370,7 +370,7 @@ static int gpr_device_remove(struct device *dev)
 		spin_unlock(&gpr->svcs_lock);
 	}
 
-	return 0;
+	return;
 }
 
 static int gpr_uevent(struct device *dev, struct kobj_uevent_env *env)