ACPI / PCI: pci_slot: replace printk(KERN_xxx) with pr_xxx()

Trivial changes to replace printk(KERN_xxx) with pr_xxx().
Signed-off-by: Jiang Liu <jiang.liu@huawei.com>
Acked-by: Bjorn Helgaas <bhelgaas@google.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>

drivers/acpi/pci_slot.c

@@ -50,13 +50,12 @@ module_param(debug, bool, 0644);
 ACPI_MODULE_NAME("pci_slot");
 
 #define MY_NAME "pci_slot"
-#define err(format, arg...) printk(KERN_ERR "%s: " format , MY_NAME , ## arg)
-#define info(format, arg...) printk(KERN_INFO "%s: " format , MY_NAME , ## arg)
+#define err(format, arg...) pr_err("%s: " format , MY_NAME , ## arg)
+#define info(format, arg...) pr_info("%s: " format , MY_NAME , ## arg)
 #define dbg(format, arg...)					\
 	do {							\
 		if (debug)					\
-			printk(KERN_DEBUG "%s: " format,	\
-				MY_NAME , ## arg);		\
+			pr_debug("%s: " format,	MY_NAME , ## arg); \
 	} while (0)
 
 #define SLOT_NAME_SIZE 21		/* Inspired by #define in acpiphp.h */