lib: crc64: fix kernel-doc warning

Fix W=1 kernel build warning:

  lib/crc64.c:40: warning:
   bad line:         or the previous crc64 value if computing incrementally.

Link: https://lkml.kernel.org/r/[email protected]
Signed-off-by: YueHaibing <[email protected]>
Reviewed-by: Coly Li <[email protected]>
Acked-by: Randy Dunlap <[email protected]>
Tested-by: Randy Dunlap <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>

Author: YueHaibing

lib/crc64.c

@@ -37,7 +37,7 @@ MODULE_LICENSE("GPL v2");
 /**
  * crc64_be - Calculate bitwise big-endian ECMA-182 CRC64
  * @crc: seed value for computation. 0 or (u64)~0 for a new CRC calculation,
-	or the previous crc64 value if computing incrementally.
+ *       or the previous crc64 value if computing incrementally.
  * @p: pointer to buffer over which CRC64 is run
  * @len: length of buffer @p
  */