[PATCH] USB: Remove unneeded kmalloc() return value casts

Remove kmalloc() return value casts that we don't need from
drivers/usb/*

Signed-off-by: Jesper Juhl <jesper.juhl@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
diff --git a/drivers/usb/misc/rio500.c b/drivers/usb/misc/rio500.c
index b9d6607..384fa37 100644
--- a/drivers/usb/misc/rio500.c
+++ b/drivers/usb/misc/rio500.c
@@ -465,14 +465,14 @@
 
 	rio->rio_dev = dev;
 
-	if (!(rio->obuf = (char *) kmalloc(OBUF_SIZE, GFP_KERNEL))) {
+	if (!(rio->obuf = kmalloc(OBUF_SIZE, GFP_KERNEL))) {
 		err("probe_rio: Not enough memory for the output buffer");
 		usb_deregister_dev(intf, &usb_rio_class);
 		return -ENOMEM;
 	}
 	dbg("probe_rio: obuf address:%p", rio->obuf);
 
-	if (!(rio->ibuf = (char *) kmalloc(IBUF_SIZE, GFP_KERNEL))) {
+	if (!(rio->ibuf = kmalloc(IBUF_SIZE, GFP_KERNEL))) {
 		err("probe_rio: Not enough memory for the input buffer");
 		usb_deregister_dev(intf, &usb_rio_class);
 		kfree(rio->obuf);