selinux: constify write_op[]

write_op[] is never modified, so make it 'const'.
Signed-off-by: Eric Biggers <ebiggers@google.com>
Signed-off-by: Paul Moore <paul@paul-moore.com>

security/selinux/selinuxfs.c

@@ -773,7 +773,7 @@ static ssize_t sel_write_relabel(struct file *file, char *buf, size_t size);
 static ssize_t sel_write_user(struct file *file, char *buf, size_t size);
 static ssize_t sel_write_member(struct file *file, char *buf, size_t size);
 
-static ssize_t (*write_op[])(struct file *, char *, size_t) = {
+static ssize_t (*const write_op[])(struct file *, char *, size_t) = {
 	[SEL_ACCESS] = sel_write_access,
 	[SEL_CREATE] = sel_write_create,
 	[SEL_RELABEL] = sel_write_relabel,