pnp: fix kernel-doc warnings

Fix PNP docbook warnings:

Warning(linux-2623-rc1g4//drivers/pnp/core.c): no structured comments found
Warning(linux-2623-rc1g4//drivers/pnp/driver.c): no structured comments found
Signed-off-by: NRandy Dunlap <randy.dunlap@oracle.com>
Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>

Documentation/DocBook/kernel-api.tmpl

@@ -398,12 +398,12 @@ X!Edrivers/acpi/pci_bind.c
 -->
      </sect1>
      <sect1><title>Device drivers PnP support</title>
-!Edrivers/pnp/core.c
+!Idrivers/pnp/core.c
 <!-- No correct structured comments
 X!Edrivers/pnp/system.c
  -->
 !Edrivers/pnp/card.c
-!Edrivers/pnp/driver.c
+!Idrivers/pnp/driver.c
 !Edrivers/pnp/manager.c
 !Edrivers/pnp/support.c
      </sect1>