s2idle: Calculate end of `test` cycles for long cycles

If a cycle request will cross over 1 day then they will be
missing in the report.  Calculate to get the boundaries right.

Closes: https://gitlab.freedesktop.org/drm/amd/-/issues/4590
Signed-off-by: Mario Limonciello <superm1@kernel.org>
diff --git a/src/amd_debug/s2idle.py b/src/amd_debug/s2idle.py
index 4ac98b0..f1ead65 100644
--- a/src/amd_debug/s2idle.py
+++ b/src/amd_debug/s2idle.py
@@ -213,8 +213,10 @@
 
     try:
         duration, wait, count = prompt_test_arguments(duration, wait, count, rand)
+        total_seconds = (duration + wait) * count
+        until_time = datetime.now() + timedelta(seconds=total_seconds)
         since, until, fname, fmt, report_debug = prompt_report_arguments(
-            datetime.now().isoformat(), Defaults.until.isoformat(), fname, fmt, True
+            datetime.now().isoformat(), until_time.isoformat(), fname, fmt, True
         )
     except KeyboardInterrupt:
         sys.exit("\nTest cancelled")