Update comments to start_step_over

I happen to see that comments to start_step_over isn't in sync with
code, so this patch is to update the comments.

gdb/gdbserver:

2016-03-03  Yao Qi  <yao.qi@linaro.org>

	* linux-low.c: Update comments to start_step_over.

1 files changed, 4 insertions, 12 deletions

diff --git a/gdb/gdbserver/linux-low.c b/gdb/gdbserver/linux-low.c
index 6b07c90..c008847 100644
--- a/gdb/gdbserver/linux-low.c
+++ b/gdb/gdbserver/linux-low.c
@@ -4625,18 +4625,10 @@ need_step_over_p (struct inferior_list_entry *entry, void *dummy)
    of the way.  If we let other threads run while we do that, they may
    pass by the breakpoint location and miss hitting it.  To avoid
    that, a step-over momentarily stops all threads while LWP is
-   single-stepped while the breakpoint is temporarily uninserted from
-   the inferior.  When the single-step finishes, we reinsert the
-   breakpoint, and let all threads that are supposed to be running,
-   run again.
-
-   On targets that don't support hardware single-step, we don't
-   currently support full software single-stepping.  Instead, we only
-   support stepping over the thread event breakpoint, by asking the
-   low target where to place a reinsert breakpoint.  Since this
-   routine assumes the breakpoint being stepped over is a thread event
-   breakpoint, it usually assumes the return address of the current
-   function is a good enough place to set the reinsert breakpoint.  */
+   single-stepped by either hardware or software while the breakpoint
+   is temporarily uninserted from the inferior.  When the single-step
+   finishes, we reinsert the breakpoint, and let all threads that are
+   supposed to be running, run again.  */
 
 static int
 start_step_over (struct lwp_info *lwp)