s390/pci: update function handle after resume from hibernate

Function handles may change while the system was in hibernation
use list pci functions and update the function handles.

Signed-off-by: Sebastian Ott <sebott@linux.vnet.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>

arch/s390/kernel/suspend.c

@@ -12,6 +12,7 @@
 #include <asm/ctl_reg.h>
 #include <asm/ipl.h>
 #include <asm/cio.h>
+#include <asm/pci.h>
 
 /*
  * References to section boundaries
@@ -219,4 +220,5 @@ void s390_early_resume(void)
 {
 	lgr_info_log();
 	channel_subsystem_reinit();
+	zpci_rescan();
 }