drm/i915/cnl: Add Cannonlake PCI IDs for U-skus.

Platform enabling and its power-on are organized in different
skus (U x Y x S x H, etc). So instead of organizing it in
GT1 x GT2 x GT3 let's also use the platform sku.

This is also the new Spec style what makes the review much
more easy and straightforward.

v2: Really include the PCI IDs to the picidlist[];
v3: Remove PCI IDs not present in spec.
v4: Rebase.

Signed-off-by: Anusha Srivatsa <anusha.srivatsa@intel.com>
Signed-off-by: Rodrigo Vivi <rodrigo.vivi@intel.com>
Reviewed-by: Clinton Taylor <clinton.a.taylor@intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/1496781040-20888-3-git-send-email-rodrigo.vivi@intel.com

drivers/gpu/drm/i915/i915_pci.c

@@ -477,6 +477,7 @@ static const struct pci_device_id pciidlist[] = {
 	INTEL_KBL_GT2_IDS(&intel_kabylake_info),
 	INTEL_KBL_GT3_IDS(&intel_kabylake_gt3_info),
 	INTEL_KBL_GT4_IDS(&intel_kabylake_gt3_info),
+	INTEL_CNL_IDS(&intel_cannonlake_info),
 	{0, 0, 0}
 };
 MODULE_DEVICE_TABLE(pci, pciidlist);

include/drm/i915_pciids.h

@@ -334,4 +334,14 @@
 	INTEL_KBL_GT3_IDS(info), \
 	INTEL_KBL_GT4_IDS(info)
 
+/* CNL U 2+2 */
+#define INTEL_CNL_U_GT2_IDS(info) \
+	INTEL_VGA_DEVICE(0x5A52, info), \
+	INTEL_VGA_DEVICE(0x5A5A, info), \
+	INTEL_VGA_DEVICE(0x5A42, info), \
+	INTEL_VGA_DEVICE(0x5A4A, info)
+
+#define INTEL_CNL_IDS(info) \
+	INTEL_CNL_U_GT2_IDS(info)
+
 #endif /* _I915_PCIIDS_H */