sb,soc/intel: Use register_new_ioapic_gsi0()

Change-Id: I6b0e4021595fb160ae3bf798468f4505b460266f
Signed-off-by: Kyösti Mälkki <kyosti.malkki@gmail.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/55314
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Arthur Heymans <arthur@aheymans.xyz>
diff --git a/src/southbridge/intel/ibexpeak/lpc.c b/src/southbridge/intel/ibexpeak/lpc.c
index d4e3098..f0d0ac9 100644
--- a/src/southbridge/intel/ibexpeak/lpc.c
+++ b/src/southbridge/intel/ibexpeak/lpc.c
@@ -35,7 +35,7 @@
 	/* affirm full set of redirection table entries ("write once") */
 	ioapic_lock_max_vectors(VIO_APIC_VADDR);
 
-	setup_ioapic(VIO_APIC_VADDR, 0x01);
+	register_new_ioapic_gsi0(VIO_APIC_VADDR);
 }
 
 static void pch_enable_serial_irqs(struct device *dev)