nb/intel/ironlake: Add QPI Physical Layer device definition

Like the QPI Link device, there can be more of these devices on
multi-socket platforms. So, name it Physical Layer 0.

Tested with BUILD_TIMELESS=1, Packard Bell MS2290 remains identical.

Change-Id: Ia5f6e42a742bc69237de38f1833e56c8da7c4f7e
Signed-off-by: Angel Pons <th3fanbus@gmail.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/43737
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Arthur Heymans <arthur@aheymans.xyz>

src/northbridge/intel/ironlake/ironlake.h

@@ -70,6 +70,11 @@
 #define QPI_QPILS		0x50 /* QPI Link Status */
 #define QPI_DEF_RMT_VN_CREDITS	0x58 /* Default Available Remote Credits */
 
+/*
+ * QPI Physical Layer 0
+ */
+#define QPI_PHY_0		PCI_DEV(QUICKPATH_BUS, 2, 1)
+
 
 /* Device 0:2.0 PCI configuration space (Graphics Device) */