Correct explanations of "find_next" bit routines.

Correct the obvious "copy and paste" errors explaining some of the
"find_next" routines.

Signed-off-by: Robert P. J. Day <rpjday@mindspring.com>
Acked-by: Randy Dunlap <randy.dunlap@oracle.com>
Signed-off-by: Adrian Bunk <bunk@kernel.org>
diff --git a/arch/x86/lib/bitops_64.c b/arch/x86/lib/bitops_64.c
index 95b6d96..0e8f491 100644
--- a/arch/x86/lib/bitops_64.c
+++ b/arch/x86/lib/bitops_64.c
@@ -58,7 +58,7 @@
 }
 
 /**
- * find_next_zero_bit - find the first zero bit in a memory region
+ * find_next_zero_bit - find the next zero bit in a memory region
  * @addr: The address to base the search on
  * @offset: The bitnumber to start searching at
  * @size: The maximum size to search