DRM: remove drm_pci_device_is_pcie

drm_pci_device_is_pcie duplicates the funcationality of pci_is_pcie.
Convert callers of the former to the latter.  This has the side benefit
of removing an unnecessary search in the PCI configuration space due to
using a saved PCIe capability offset.

[airlied: update for new callsite]

Signed-off-by: Jon Mason <jdmason@kudzu.us>
Signed-off-by: Dave Airlie <airlied@redhat.com>
diff --git a/drivers/gpu/drm/nouveau/nv04_instmem.c b/drivers/gpu/drm/nouveau/nv04_instmem.c
index e2075de..c1248e0 100644
--- a/drivers/gpu/drm/nouveau/nv04_instmem.c
+++ b/drivers/gpu/drm/nouveau/nv04_instmem.c
@@ -42,7 +42,7 @@
 		rsvd *= dev_priv->engine.fifo.channels;
 
 		/* pciegart table */
-		if (drm_pci_device_is_pcie(dev))
+		if (pci_is_pcie(dev->pdev))
 			rsvd += 512 * 1024;
 
 		/* object storage */