dmaengine: idma64: Move driver name to the header

There are two drivers that are relying on the iDMA 64-bit driver name
to match. Instead of duplicating string in both of them, dedicate
a header file and share it between users.

Signed-off-by: Andy Shevchenko <[e-mail]>
Signed-off-by: Vinod Koul <[e-mail]>

drivers/dma/idma64.c

···
 #include <linux/platform_device.h>
 #include <linux/slab.h>
 
-#include "idma64.h"
+#include <linux/dma/idma64.h>
 
-/* Platform driver name */
-#define DRV_NAME		"idma64"
+#include "idma64.h"
 
 /* For now we support only two channels */
 #define IDMA64_NR_CHAN		2
···
 	.probe		= idma64_platform_probe,
 	.remove		= idma64_platform_remove,
 	.driver = {
-		.name	= DRV_NAME,
+		.name	= LPSS_IDMA64_DRIVER_NAME,
 		.pm	= &idma64_dev_pm_ops,
 	},
 };
···
 MODULE_LICENSE("GPL v2");
 MODULE_DESCRIPTION("iDMA64 core driver");
 MODULE_AUTHOR("Andy Shevchenko <[e-mail]>");
-MODULE_ALIAS("platform:" DRV_NAME);
+MODULE_ALIAS("platform:" LPSS_IDMA64_DRIVER_NAME);

drivers/mfd/intel-lpss.c

···
 #include <linux/seq_file.h>
 #include <linux/io-64-nonatomic-lo-hi.h>
 
+#include <linux/dma/idma64.h>
+
 #include "intel-lpss.h"
 
 #define LPSS_DEV_OFFSET		0x000
···
 	DEFINE_RES_MEM(LPSS_IDMA64_OFFSET, LPSS_IDMA64_SIZE),
 	DEFINE_RES_IRQ(0),
 };
-
-#define LPSS_IDMA64_DRIVER_NAME		"idma64"
 
 /*
  * Cells needs to be ordered so that the iDMA is created first. This is

include/linux/dma/idma64.h

···
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
+ * Definitions for the Intel integrated DMA 64-bit
+ *
+ * Copyright (C) 2019 Intel Corporation
+ */
+
+#ifndef __LINUX_DMA_IDMA64_H__
+#define __LINUX_DMA_IDMA64_H__
+
+/* Platform driver name */
+#define LPSS_IDMA64_DRIVER_NAME		"idma64"
+
+#endif /* __LINUX_DMA_IDMA64_H__ */