const: constify remaining file_operations

[akpm@linux-foundation.org: fix KVM]
Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com>
Acked-by: Mike Frysinger <vapier@gentoo.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
diff --git a/drivers/usb/misc/rio500.c b/drivers/usb/misc/rio500.c
index d645f38..32d0199 100644
--- a/drivers/usb/misc/rio500.c
+++ b/drivers/usb/misc/rio500.c
@@ -429,8 +429,7 @@
 	return read_count;
 }
 
-static struct
-file_operations usb_rio_fops = {
+static const struct file_operations usb_rio_fops = {
 	.owner =	THIS_MODULE,
 	.read =		read_rio,
 	.write =	write_rio,