staging/keucr: fix build when CONFIG_PM is not enabled

keucr driver has a build error when CONFIG_PM is not enabled, so fix that.

drivers/staging/keucr/usb.c:42: error: 'struct us_data' has no member named 'suspend_resume_hook'
drivers/staging/keucr/usb.c:43: error: 'struct us_data' has no member named 'suspend_resume_hook'
drivers/staging/keucr/usb.c:64: error: 'struct us_data' has no member named 'suspend_resume_hook'
drivers/staging/keucr/usb.c:65: error: 'struct us_data' has no member named 'suspend_resume_hook'

Signed-off-by: Randy Dunlap <randy.dunlap@oracle.com>
Cc: Al Cho <acho@novell.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

drivers/staging/keucr/usb.c

@@ -30,6 +30,7 @@ static struct usb_device_id eucr_usb_ids [] = {
 MODULE_DEVICE_TABLE (usb, eucr_usb_ids);
 
 
+#ifdef CONFIG_PM
 
 int eucr_suspend(struct usb_interface *iface, pm_message_t message)
 {
@@ -102,6 +103,14 @@ int eucr_reset_resume(struct usb_interface *iface)
 }
 //EXPORT_SYMBOL_GPL(usb_stor_reset_resume);
 
+#else
+
+#define eucr_suspend		NULL
+#define eucr_resume		NULL
+#define eucr_reset_resume	NULL
+
+#endif
+
 //----- eucr_pre_reset() ---------------------
 static int eucr_pre_reset(struct usb_interface *iface)
 {