executer/exsystem: Warn about sleeps greater than 10 ms

Quick boottime is important, so warn about sleeps greater than 10 ms.

Distribution Linux kernels reach initrd in 350 ms, so excessive delays
should be called out. 10 ms is chosen randomly, but three of such delays
would make ten percent of the boottime.

source/components/executer/exsystem.c

@@ -338,6 +338,12 @@ AcpiExSystemDoSleep (
 
     AcpiExExitInterpreter ();
 
+    if (HowLongMs > 50)
+    {
+        ACPI_WARNING ((AE_INFO,
+            "Firmware issue: Excessive delay (%llu ms > 10 ms) in ACPI Control Method", HowLongUs));
+    }
+
     /*
      * For compatibility with other ACPI implementations and to prevent
      * accidental deep sleeps, limit the sleep time to something reasonable.