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>
diff --git a/include/linux/firewire-cdev.h b/include/linux/firewire-cdev.h
index 68c642d..59ea406 100644
--- a/include/linux/firewire-cdev.h
+++ b/include/linux/firewire-cdev.h
@@ -273,7 +273,7 @@
  * @closure:	See &fw_cdev_event_common;
  *		set by %FW_CDEV_CREATE_ISO_CONTEXT ioctl
  * @type:	%FW_CDEV_EVENT_ISO_INTERRUPT_MULTICHANNEL
- * @completed:	Offset into the receive buffer; data before this offest is valid
+ * @completed:	Offset into the receive buffer; data before this offset is valid
  *
  * This event is sent in multichannel contexts (context type
  * %FW_CDEV_ISO_CONTEXT_RECEIVE_MULTICHANNEL) for &fw_cdev_iso_packet buffer