idr: fix new kernel-doc warnings

Fix new kernel-doc warnings in idr:

  Warning(include/linux/idr.h:113): No description found for parameter 'idr'
  Warning(include/linux/idr.h:113): Excess function parameter 'idp' description in 'idr_find'
  Warning(lib/idr.c:232): Excess function parameter 'id' description in 'sub_alloc'
  Warning(lib/idr.c:232): Excess function parameter 'id' description in 'sub_alloc'

Signed-off-by: Randy Dunlap <rdunlap@infradead.org>
Acked-by: Tejun Heo <tj@kernel.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
diff --git a/include/linux/idr.h b/include/linux/idr.h
index a6f38b5..8c1f81f 100644
--- a/include/linux/idr.h
+++ b/include/linux/idr.h
@@ -99,7 +99,7 @@
 
 /**
  * idr_find - return pointer for given id
- * @idp: idr handle
+ * @idr: idr handle
  * @id: lookup key
  *
  * Return the pointer given the id it has been registered with.  A %NULL