[POWERPC] Update fixup_winbond_82c105 comment

Note all POWER3/POWER4 systems where fixup_winbond_82c105 will run.

Signed-off-by: Olaf Hering <olaf@aepfle.de>
Signed-off-by: Paul Mackerras <paulus@samba.org>
diff --git a/arch/powerpc/platforms/pseries/pci.c b/arch/powerpc/platforms/pseries/pci.c
index 715db5c..c69bd15 100644
--- a/arch/powerpc/platforms/pseries/pci.c
+++ b/arch/powerpc/platforms/pseries/pci.c
@@ -77,7 +77,7 @@
 
 /*
  * Assume the winbond 82c105 is the IDE controller on a
- * p610.  We should probably be more careful in case
+ * p610/p615/p630. We should probably be more careful in case
  * someone tries to plug in a similar adapter.
  */
 static void fixup_winbond_82c105(struct pci_dev* dev)