gcov: fix kernel-doc markup issue

Fix the following kernel-doc issue in gcov:

  kernel/gcov/gcc_4_7.c:238: warning: Function parameter or member 'dst' not described in 'gcov_info_add'
  kernel/gcov/gcc_4_7.c:238: warning: Function parameter or member 'src' not described in 'gcov_info_add'
  kernel/gcov/gcc_4_7.c:238: warning: Excess function parameter 'dest' description in 'gcov_info_add'
  kernel/gcov/gcc_4_7.c:238: warning: Excess function parameter 'source' description in 'gcov_info_add'

Link: https://lkml.kernel.org/r/1605252352-63983-1-git-send-email-alex.shi@linux.alibaba.comSigned-off-by: Alex Shi <alex.shi@linux.alibaba.com>
Acked-by: Peter Oberparleiter <oberpar@linux.ibm.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

kernel/gcov/gcc_4_7.c

@@ -227,10 +227,10 @@ int gcov_info_is_compatible(struct gcov_info *info1, struct gcov_info *info2)
 
 /**
  * gcov_info_add - add up profiling data
- * @dest: profiling data set to which data is added
- * @source: profiling data set which is added
+ * @dst: profiling data set to which data is added
+ * @src: profiling data set which is added
  *
- * Adds profiling counts of @source to @dest.
+ * Adds profiling counts of @src to @dst.
  */
 void gcov_info_add(struct gcov_info *dst, struct gcov_info *src)
 {