nb/intel/ironlake: Add QPI Link register definitions

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

Change-Id: Id226a2fdcbd0fe48822c4f65746e14fb00db6b2e
Signed-off-by: Angel Pons <th3fanbus@gmail.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/43736
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Arthur Heymans <arthur@aheymans.xyz>

src/northbridge/intel/ironlake/ironlake.h

@@ -65,6 +65,11 @@
  */
 #define QPI_LINK_0		PCI_DEV(QUICKPATH_BUS, 2, 0)
 
+#define QPI_QPILCP		0x40 /* QPI Link Capability */
+#define QPI_QPILCL		0x48 /* QPI Link Control */
+#define QPI_QPILS		0x50 /* QPI Link Status */
+#define QPI_DEF_RMT_VN_CREDITS	0x58 /* Default Available Remote Credits */
+
 
 /* Device 0:2.0 PCI configuration space (Graphics Device) */