usb: isp1760: remove platform data struct and code

Since the removal of the Blackfin port with:
commit 4ba66a97 ("arch: remove blackfin port")

No one is using or referencing this header and platform data struct.
Remove them.
Signed-off-by: Rui Miguel Silva <rui.silva@linaro.org>
Link: https://lore.kernel.org/r/20210513084717.2487366-5-rui.silva@linaro.orgSigned-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/usb/isp1760/isp1760-if.c

@@ -16,7 +16,6 @@
 #include <linux/of.h>
 #include <linux/platform_device.h>
 #include <linux/slab.h>
-#include <linux/usb/isp1760.h>
 #include <linux/usb/hcd.h>
 
 #include "isp1760-core.h"
@@ -225,22 +224,9 @@ static int isp1760_plat_probe(struct platform_device *pdev)
 
 		if (of_property_read_bool(dp, "dreq-polarity"))
 			devflags |= ISP1760_FLAG_DREQ_POL_HIGH;
-	} else if (dev_get_platdata(&pdev->dev)) {
-		struct isp1760_platform_data *pdata =
-			dev_get_platdata(&pdev->dev);
-
-		if (pdata->is_isp1761)
-			devflags |= ISP1760_FLAG_ISP1761;
-		if (pdata->bus_width_16)
-			devflags |= ISP1760_FLAG_BUS_WIDTH_16;
-		if (pdata->port1_otg)
-			devflags |= ISP1760_FLAG_OTG_EN;
-		if (pdata->analog_oc)
-			devflags |= ISP1760_FLAG_ANALOG_OC;
-		if (pdata->dack_polarity_high)
-			devflags |= ISP1760_FLAG_DACK_POL_HIGH;
-		if (pdata->dreq_polarity_high)
-			devflags |= ISP1760_FLAG_DREQ_POL_HIGH;
+	} else {
+		pr_err("isp1760: no platform data\n");
+		return -ENXIO;
 	}
 
 	ret = isp1760_register(mem_res, irq_res->start, irqflags, &pdev->dev,

include/linux/usb/isp1760.h

-/* SPDX-License-Identifier: GPL-2.0 */
-/*
- * board initialization should put one of these into dev->platform_data
- * and place the isp1760 onto platform_bus named "isp1760-hcd".
- */
-
-#ifndef __LINUX_USB_ISP1760_H
-#define __LINUX_USB_ISP1760_H
-
-struct isp1760_platform_data {
-	unsigned is_isp1761:1;			/* Chip is ISP1761 */
-	unsigned bus_width_16:1;		/* 16/32-bit data bus width */
-	unsigned port1_otg:1;			/* Port 1 supports OTG */
-	unsigned analog_oc:1;			/* Analog overcurrent */
-	unsigned dack_polarity_high:1;		/* DACK active high */
-	unsigned dreq_polarity_high:1;		/* DREQ active high */
-};
-
-#endif /* __LINUX_USB_ISP1760_H */