sb/intel/i82801jx/sata.c: Handle ABAR as a resource

Instead of directly reading ABAR without any checking, do like i82801ix
and treat it as a resource. This prevents problems if ABAR is not set.

Change-Id: I4f888b748204860b0a7e1bf5611f5f3e487e8081
Signed-off-by: Angel Pons <th3fanbus@gmail.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/42643
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Patrick Rudolph <siro@das-labor.org>
diff --git a/src/southbridge/intel/i82801jx/sata.c b/src/southbridge/intel/i82801jx/sata.c
index 73a7d82..0372460 100644
--- a/src/southbridge/intel/i82801jx/sata.c
+++ b/src/southbridge/intel/i82801jx/sata.c
@@ -20,9 +20,14 @@
 {
 	int i;
 	u32 reg32;
+	struct resource *res;
 
 	/* Initialize AHCI memory-mapped space */
-	u8 *abar = (u8 *)pci_read_config32(dev, PCI_BASE_ADDRESS_5);
+	res = probe_resource(dev, PCI_BASE_ADDRESS_5);
+	if (!res)
+		return;
+
+	u8 *abar = res2mmio(res, 0, 0);
 	printk(BIOS_DEBUG, "ABAR: %p\n", abar);
 
 	/* Set AHCI access mode.