soc/amd/common/def_callouts.c: Prefer using '"%s...", __func__'

In function agesa_GfxGetVbiosImage(), the function name is used in a print
string. Use __func__ instead.

BUG=b:117642170
TEST=Build grunt.

Change-Id: I95a042bd95cc729305a8a008e3bb464f60c2668d
Signed-off-by: Richard Spiegel <richard.spiegel@silverbackltd.com>
Reviewed-on: https://review.coreboot.org/29246
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Marshall Dawson <marshalldawson3rd@gmail.com>
diff --git a/src/soc/amd/common/block/pi/def_callouts.c b/src/soc/amd/common/block/pi/def_callouts.c
index 27d4b0b..60bfad1 100644
--- a/src/soc/amd/common/block/pi/def_callouts.c
+++ b/src/soc/amd/common/block/pi/def_callouts.c
@@ -152,8 +152,8 @@
 	pVbiosImageInfo->ImagePtr = cbfs_boot_map_with_leak(
 			"pci"CONFIG_VGA_BIOS_ID".rom",
 			CBFS_TYPE_OPTIONROM, NULL);
-	printk(BIOS_DEBUG, "agesa_GfxGetVbiosImage: IMGptr=%p\n",
-						pVbiosImageInfo->ImagePtr);
+	printk(BIOS_DEBUG, "%s: IMGptr=%p\n", __func__,
+			pVbiosImageInfo->ImagePtr);
 	return pVbiosImageInfo->ImagePtr ? AGESA_SUCCESS : AGESA_WARNING;
 }