src: Substitute `__FUNCTION__` with `__func__`

The former is not standard C, and we primarily use the latter form.

Change-Id: Ia7091b494ff72588fb6910710fd72165693c1ac5
Signed-off-by: Angel Pons <th3fanbus@gmail.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/42516
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Paul Menzel <paulepanter@users.sourceforge.net>
Reviewed-by:  Felix Singer <felixsinger@posteo.net>
Reviewed-by: Christian Walter <christian.walter@9elements.com>
diff --git a/src/southbridge/intel/lynxpoint/me_9.x.c b/src/southbridge/intel/lynxpoint/me_9.x.c
index aeab0c7..cdae271 100644
--- a/src/southbridge/intel/lynxpoint/me_9.x.c
+++ b/src/southbridge/intel/lynxpoint/me_9.x.c
@@ -529,7 +529,7 @@
 	};
 
 	/* Send request and wait for response */
-	printk(BIOS_NOTICE, "ME: %s\n", __FUNCTION__);
+	printk(BIOS_NOTICE, "ME: %s\n", __func__);
 	if (mei_sendrecv_mkhi(&mkhi, &reset, sizeof(reset), NULL, 0) < 0) {
 		/* No response means reset will happen shortly... */
 		halt();
@@ -551,7 +551,7 @@
 	u32 eop_ack;
 
 	/* Send request and wait for response */
-	printk(BIOS_NOTICE, "ME: %s\n", __FUNCTION__);
+	printk(BIOS_NOTICE, "ME: %s\n", __func__);
 	if (mei_sendrecv_mkhi(&mkhi, NULL, 0, &eop_ack, sizeof(eop_ack)) < 0) {
 		printk(BIOS_ERR, "ME: END OF POST message failed\n");
 		return -1;
@@ -698,7 +698,7 @@
 	/* Check if the MBP is ready */
 	if (!hfs2.mbp_rdy) {
 		printk(BIOS_CRIT, "%s: mbp is not ready!\n",
-		       __FUNCTION__);
+		       __func__);
 		path = ME_ERROR_BIOS_PATH;
 	}