Documentation: kernel-parameters: add workqueue.panic_on_stall

The workqueue.panic_on_stall kernel parameter was added in commit
073107b ("workqueue: add cmdline parameter workqueue.panic_on_stall")
but not listed in the kernel-parameters doc. Add it there.

Signed-off-by: Sangmoon Kim <[email protected]>
Signed-off-by: Tejun Heo <[email protected]>

Author: Sangmoon Kim

Documentation/admin-guide/kernel-parameters.txt

@@ -7354,6 +7354,13 @@
 			it can be updated at runtime by writing to the
 			corresponding sysfs file.
 
+	workqueue.panic_on_stall=<uint>
+			Panic when workqueue stall is detected by
+			CONFIG_WQ_WATCHDOG. It sets the number times of the
+			stall to trigger panic.
+
+			The default is 0, which disables the panic on stall.
+
 	workqueue.cpu_intensive_thresh_us=
 			Per-cpu work items which run for longer than this
 			threshold are automatically considered CPU intensive