sb/intel/i82801jx: Use common early SPI code

Change-Id: If9efbde5939913b67852b377dd84cd4de1ec2718
Signed-off-by: Angel Pons <th3fanbus@gmail.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/42664
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Patrick Rudolph <siro@das-labor.org>

src/southbridge/intel/i82801jx/bootblock.c

@@ -2,16 +2,12 @@
 
 #include <arch/bootblock.h>
 #include <device/pci_ops.h>
+#include <southbridge/intel/common/early_spi.h>
 #include "i82801jx.h"
 
-static void enable_spi_prefetch(void)
-{
-	pci_update_config8(PCI_DEV(0, 0x1f, 0), 0xdc, ~(3 << 2), 2 << 2);
-}
-
 void bootblock_early_southbridge_init(void)
 {
-	enable_spi_prefetch();
+	enable_spi_prefetching_and_caching();
 
 	i82801jx_setup_bars();