Family 15tn: Update for string portability

Update function messages to be more portable by using
the __func__ compiler command instead of hard coded
function names.

Change-Id: Ib8ab97666340a9481f3ab71f0f347382e964994f
Signed-off-by: Mike Loptien <mike.loptien@se-eng.com>
Reviewed-on: http://review.coreboot.org/2251
Tested-by: build bot (Jenkins)
Reviewed-by: Marc Jones <marcj303@gmail.com>
diff --git a/src/northbridge/amd/agesa/family15tn/northbridge.c b/src/northbridge/amd/agesa/family15tn/northbridge.c
index 68b6429..2ff5c1a 100644
--- a/src/northbridge/amd/agesa/family15tn/northbridge.c
+++ b/src/northbridge/amd/agesa/family15tn/northbridge.c
@@ -563,7 +563,7 @@
 #endif
 
 	/* Must be called after PCI enumeration and resource allocation */
-	printk(BIOS_DEBUG, "\nFam15 - domain_enable_resources: AmdInitMid.\n");
+	printk(BIOS_DEBUG, "\nFam15 - %s: AmdInitMid.\n", __func__);
 #if CONFIG_HAVE_ACPI_RESUME
 	if (acpi_slp_type != 3) {
 		printk(BIOS_DEBUG, "agesawrapper_amdinitmid ");
@@ -582,7 +582,7 @@
 		printk(BIOS_DEBUG, "passed.\n");
 #endif
 
-	printk(BIOS_DEBUG, "  ader - leaving domain_enable_resources.\n");
+	printk(BIOS_DEBUG, "  ader - leaving %s.\n", __func__);
 }
 
 #if CONFIG_HW_MEM_HOLE_SIZEK != 0