x86/of: Replace printk(KERN_LVL) with pr_lvl()

Use pr_lvl() instead of the deprecated printk(KERN_LVL).

Just a upgrade of print utilities usage. no functional changes.
Suggested-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Rahul Tanwar <rtanwar@maxlinear.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Link: https://lore.kernel.org/r/20221124084143.21841-4-rtanwar@maxlinear.com

arch/x86/kernel/devicetree.c

@@ -243,7 +243,7 @@ static void __init dtb_add_ioapic(struct device_node *dn)
 
 	ret = of_address_to_resource(dn, 0, &r);
 	if (ret) {
-		printk(KERN_ERR "Can't obtain address from device node %pOF.\n", dn);
+		pr_err("Can't obtain address from device node %pOF.\n", dn);
 		return;
 	}
 	mp_register_ioapic(++ioapic_id, r.start, gsi_top, &cfg);
@@ -260,7 +260,7 @@ static void __init dtb_ioapic_setup(void)
 		of_ioapic = 1;
 		return;
 	}
-	printk(KERN_ERR "Error: No information about IO-APIC in OF.\n");
+	pr_err("Error: No information about IO-APIC in OF.\n");
 }
 #else
 static void __init dtb_ioapic_setup(void) {}