sb/intel: Replace bad uses of `find_resource`

The `find_resource` function will never return null (will die instead).
In cases where the existing code already accounts for null pointers, it
is better to use `probe_resource` instead, which returns a null pointer
instead of dying.

Change-Id: I13c7ebeba2e5a896d46231b5e176e5470da97343
Signed-off-by: Angel Pons <th3fanbus@gmail.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/58905
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Werner Zeh <werner.zeh@siemens.com>
diff --git a/src/southbridge/intel/ibexpeak/smbus.c b/src/southbridge/intel/ibexpeak/smbus.c
index 12734a0..6652325 100644
--- a/src/southbridge/intel/ibexpeak/smbus.c
+++ b/src/southbridge/intel/ibexpeak/smbus.c
@@ -19,7 +19,7 @@
 	pci_and_config16(dev, 0x80, ~((1 << 8) | (1 << 10) | (1 << 12) | (1 << 14)));
 
 	/* Set Receive Slave Address */
-	res = find_resource(dev, PCI_BASE_ADDRESS_4);
+	res = probe_resource(dev, PCI_BASE_ADDRESS_4);
 	if (res)
 		smbus_set_slave_addr(res->base, SMBUS_SLAVE_ADDR);
 }