printk: fix new kernel-doc warnings

Fix kernel-doc warnings in printk.c:

Warning(kernel/printk.c:1422): No description found for parameter 'dumper'
Warning(kernel/printk.c:1422): Excess function parameter 'dump' description in 'kmsg_dump_register'
Warning(kernel/printk.c:1451): No description found for parameter 'dumper'
Warning(kernel/printk.c:1451): Excess function parameter 'dump' description in 'kmsg_dump_unregister'

Signed-off-by: Randy Dunlap <randy.dunlap@oracle.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
diff --git a/kernel/printk.c b/kernel/printk.c
index 1ded8e7..17463ca 100644
--- a/kernel/printk.c
+++ b/kernel/printk.c
@@ -1412,7 +1412,7 @@
 
 /**
  * kmsg_dump_register - register a kernel log dumper.
- * @dump: pointer to the kmsg_dumper structure
+ * @dumper: pointer to the kmsg_dumper structure
  *
  * Adds a kernel log dumper to the system. The dump callback in the
  * structure will be called when the kernel oopses or panics and must be
@@ -1442,7 +1442,7 @@
 
 /**
  * kmsg_dump_unregister - unregister a kmsg dumper.
- * @dump: pointer to the kmsg_dumper structure
+ * @dumper: pointer to the kmsg_dumper structure
  *
  * Removes a dump device from the system. Returns zero on success and
  * %-EINVAL otherwise.