sb/intel/{common,i82801dx}: Improve TCO debug code

Report unhandled TCO bits (previously dead code). This
finishes the work done in 3e3b858 (sb/intel/ibexpeak:
Update debug code to match other chips).

Found-by: Coverity Scan, CID 1229598 (DEADCODE)
Signed-off-by: Jacob Garber <jgarber1@ualberta.ca>
Change-Id: I65df8f3363c62b364e096368a36ba5e9e8894c13
Reviewed-on: https://review.coreboot.org/c/coreboot/+/32179
Reviewed-by: Patrick Rudolph <siro@das-labor.org>
Reviewed-by: Kyösti Mälkki <kyosti.malkki@gmail.com>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>

src/southbridge/intel/common/smihandler.c

@@ -418,7 +418,7 @@ static void southbridge_smi_tco(void)
 	} else if (tco_sts & (1 << 3)) { /* TIMEOUT */
 		/* Handle TCO timeout */
 		printk(BIOS_DEBUG, "TCO Timeout.\n");
-	} else if (!tco_sts) {
+	} else {
 		dump_tco_status(tco_sts);
 	}
 }

src/southbridge/intel/i82801dx/smihandler.c

@@ -490,7 +490,7 @@ static void southbridge_smi_tco(unsigned int node, smm_state_save_area_t *state_
 	} else if (tco_sts & (1 << 3)) { /* TIMEOUT */
 		/* Handle TCO timeout */
 		printk(BIOS_DEBUG, "TCO Timeout.\n");
-	} else if (!tco_sts) {
+	} else {
 		dump_tco_status(tco_sts);
 	}
 }