tree-wide: fix comment/printk typos

"gadget", "through", "command", "maintain", "maintain", "controller", "address",
"between", "initiali[zs]e", "instead", "function", "select", "already",
"equal", "access", "management", "hierarchy", "registration", "interest",
"relative", "memory", "offset", "already",

Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>

include/linux/cgroup.h

@@ -564,7 +564,7 @@ struct cgroup_iter {
 /*
  * To iterate across the tasks in a cgroup:
  *
- * 1) call cgroup_iter_start to intialize an iterator
+ * 1) call cgroup_iter_start to initialize an iterator
  *
  * 2) call cgroup_iter_next() to retrieve member tasks until it
  *    returns NULL or until you want to end the iteration