nb/intel/ironlake: Add definition for SAD PCI device

Let's hope this cheers up the poor System Address Decoder device.

Tested with BUILD_TIMELESS=1, Packard Bell MS2290 does not change.

Change-Id: Ia62c05abb07216dc1ba449c3a17f8d53050b5af1
Signed-off-by: Angel Pons <th3fanbus@gmail.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/43732
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Arthur Heymans <arthur@aheymans.xyz>
diff --git a/src/northbridge/intel/ironlake/smi.c b/src/northbridge/intel/ironlake/smi.c
index 9ffcb99..0604d13 100644
--- a/src/northbridge/intel/ironlake/smi.c
+++ b/src/northbridge/intel/ironlake/smi.c
@@ -11,5 +11,5 @@
 
 void northbridge_write_smram(u8 smram)
 {
-	pci_write_config8(PCI_DEV(QUICKPATH_BUS, 0, 1), QPD0F1_SMRAM, smram);
+	pci_write_config8(QPI_SAD, QPD0F1_SMRAM, smram);
 }