sb/amd/cimx/sb800: Clear IOAPIC vectors only once

Change-Id: I640d17cdee2bdaa4fe7049ce66a327b58924bc6f
Signed-off-by: Kyösti Mälkki <kyosti.malkki@gmail.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/55288
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Michał Żygowski <michal.zygowski@3mdeb.com>

src/southbridge/amd/cimx/sb800/late.c

@@ -340,7 +340,6 @@ static void sb800_enable(struct device *dev)
 		break;
 
 	case PCI_DEVFN(0x14, 0): /* 0:14:0 SMBUS */
-		clear_ioapic(VIO_APIC_VADDR);
 		/* Assign the ioapic ID the next available number after the processor core local APIC IDs */
 		setup_ioapic(VIO_APIC_VADDR, CONFIG_MAX_CPUS);
 		break;