USB: misc: Remove unnecessary NULL values

The NULL initialization of the pointers assigned by kzalloc() first is
not necessary, because if the kzalloc() failed, the pointers will be
assigned NULL, otherwise it works as usual. so remove it.
Signed-off-by: Ruan Jinjie <ruanjinjie@huawei.com>
Link: https://lore.kernel.org/r/20230804093253.91647-3-ruanjinjie@huawei.comSigned-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/usb/misc/cypress_cy7c63.c

@@ -203,7 +203,7 @@ ATTRIBUTE_GROUPS(cypress);
 static int cypress_probe(struct usb_interface *interface,
 			 const struct usb_device_id *id)
 {
-	struct cypress *dev = NULL;
+	struct cypress *dev;
 	int retval = -ENOMEM;
 
 	/* allocate memory for our device state and initialize it */

drivers/usb/misc/cytherm.c

@@ -304,7 +304,7 @@ static int cytherm_probe(struct usb_interface *interface,
 			 const struct usb_device_id *id)
 {
 	struct usb_device *udev = interface_to_usbdev(interface);
-	struct usb_cytherm *dev = NULL;
+	struct usb_cytherm *dev;
 	int retval = -ENOMEM;
 
 	dev = kzalloc(sizeof(struct usb_cytherm), GFP_KERNEL);

drivers/usb/misc/usbsevseg.c

@@ -305,7 +305,7 @@ static int sevseg_probe(struct usb_interface *interface,
 	const struct usb_device_id *id)
 {
 	struct usb_device *udev = interface_to_usbdev(interface);
-	struct usb_sevsegdev *mydev = NULL;
+	struct usb_sevsegdev *mydev;
 	int rc = -ENOMEM;
 
 	mydev = kzalloc(sizeof(struct usb_sevsegdev), GFP_KERNEL);