drivers/i2c/tpm/cr50.c: Use __func__

Change-Id: If2751f3672072b7fa421ae33dc6e1490fdf35247
Signed-off-by: Elyes HAOUAS <ehaouas@noos.fr>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/49547
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Christian Walter <christian.walter@9elements.com>
diff --git a/src/drivers/i2c/tpm/cr50.c b/src/drivers/i2c/tpm/cr50.c
index 8c0f8b69..8e12d1f 100644
--- a/src/drivers/i2c/tpm/cr50.c
+++ b/src/drivers/i2c/tpm/cr50.c
@@ -49,7 +49,8 @@
 	static int warning_displayed;
 
 	if (!warning_displayed) {
-		printk(BIOS_WARNING, "WARNING: tis_plat_irq_status() not implemented, wasting 20ms to wait on Cr50!\n");
+		printk(BIOS_WARNING, "WARNING: %s() not implemented, wasting 20ms to wait on"
+		       " Cr50!\n", __func__);
 		warning_displayed = 1;
 	}
 	mdelay(CR50_TIMEOUT_NOIRQ_MS);