lib/win_minmax: use /* notation for regular comments

Don't use kernel-doc "/**" notation for non-kernel-doc comments.
Prevents a kernel-doc warning:

lib/win_minmax.c:31: warning: expecting prototype for lib/minmax.c(). Prototype was for minmax_subwin_update() instead

Link: https://lkml.kernel.org/r/[email protected]
Signed-off-by: Randy Dunlap <[email protected]>
Cc: Neal Cardwell <[email protected]>
Cc: Eric Dumazet <[email protected]>
Cc: David S. Miller <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>

Author: rddunlap

lib/win_minmax.c

@@ -1,5 +1,5 @@
 // SPDX-License-Identifier: GPL-2.0
-/**
+/*
  * lib/minmax.c: windowed min/max tracker
  *
  * Kathleen Nichols' algorithm for tracking the minimum (or maximum)