Documentation: virt: correct location of haltpoll module params

Module parameters are located in sysfs, not debugfs, so correct the
statement.

Signed-off-by: Randy Dunlap <[e-mail]>
Cc: Marcelo Tosatti <[e-mail]>
Cc: "Rafael J. Wysocki" <[e-mail]>
Link: https://lore.kernel.org/r/[e-mail]
Signed-off-by: Jonathan Corbet <[e-mail]>

Documentation/virt/guest-halt-polling.rst

···
 
 Default: Y
 
-The module parameters can be set from the debugfs files in::
+The module parameters can be set from the sysfs files in::
 
 	/sys/module/haltpoll/parameters/