dm: pci: Mark legacy files as such

We don't want people changing the legacy PCI files while migration is in
progress. Update the file headers to indicate that.

Signed-off-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Bin Meng <bmeng.cn@gmail.com>

drivers/pci/pci.c

@@ -9,7 +9,10 @@
  */
 
 /*
- * PCI routines
+ * Old PCI routines
+ *
+ * Do not change this file. Instead, convert your board to use CONFIG_DM_PCI
+ * and change pci-uclass.c.
  */
 
 #include <common.h>

drivers/pci/pci_auto_old.c

@@ -1,7 +1,5 @@
 /*
- * arch/powerpc/kernel/pci_auto.c
- *
- * PCI autoconfiguration library
+ * PCI autoconfiguration library (legacy version, do not change)
  *
  * Author: Matt Porter <mporter@mvista.com>
  *
@@ -14,6 +12,11 @@
 #include <errno.h>
 #include <pci.h>
 
+/*
+ * Do not change this file. Instead, convert your board to use CONFIG_DM_PCI
+ * and change pci_auto.c.
+ */
+
 /* the user can define CONFIG_SYS_PCI_CACHE_LINE_SIZE to avoid problems */
 #ifndef CONFIG_SYS_PCI_CACHE_LINE_SIZE
 #define CONFIG_SYS_PCI_CACHE_LINE_SIZE	8