soc/intel/denverton_ns/npk.c: Use __func__

Change-Id: Ib0f425d74bc219ef518394526b51f2756eb95d61
Signed-off-by: Elyes HAOUAS <ehaouas@noos.fr>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/49561
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by:  Felix Singer <felixsinger@posteo.net>

src/soc/intel/denverton_ns/npk.c

@@ -10,7 +10,7 @@
 
 static void npk_init(struct device *dev)
 {
-	printk(BIOS_DEBUG, "pch: npk_init\n");
+	printk(BIOS_DEBUG, "pch: %s\n", __func__);
 
 	/* TODO */
 }