drm/nv50/disp: fix dpms regression on certain boards

Reported in fdo#82527 comment #2.

Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
diff --git a/drivers/gpu/drm/nouveau/core/engine/disp/nv50.c b/drivers/gpu/drm/nouveau/core/engine/disp/nv50.c
index 4b5bb5d..f8cbb51 100644
--- a/drivers/gpu/drm/nouveau/core/engine/disp/nv50.c
+++ b/drivers/gpu/drm/nouveau/core/engine/disp/nv50.c
@@ -1763,9 +1763,10 @@
 	const int   or = ffs(outp->or) - 1;
 	const u32 loff = (or * 0x800) + (link * 0x80);
 	const u16 mask = (outp->sorconf.link << 6) | outp->or;
+	struct dcb_output match;
 	u8  ver, hdr;
 
-	if (dcb_outp_match(bios, DCB_OUTPUT_DP, mask, &ver, &hdr, outp))
+	if (dcb_outp_match(bios, DCB_OUTPUT_DP, mask, &ver, &hdr, &match))
 		nv_mask(priv, 0x61c10c + loff, 0x00000001, 0x00000000);
 }