drm/nouveau/dp: fix required link bandwidth calculations

Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
diff --git a/drivers/gpu/drm/nouveau/core/engine/disp/nvd0.c b/drivers/gpu/drm/nouveau/core/engine/disp/nvd0.c
index 48aa38a..fa30d81 100644
--- a/drivers/gpu/drm/nouveau/core/engine/disp/nvd0.c
+++ b/drivers/gpu/drm/nouveau/core/engine/disp/nvd0.c
@@ -1159,11 +1159,11 @@
 	if (outp->info.type == DCB_OUTPUT_DP) {
 		u32 sync = nv_rd32(priv, 0x660404 + (head * 0x300));
 		switch ((sync & 0x000003c0) >> 6) {
-		case 6: pclk = pclk * 30 / 8; break;
-		case 5: pclk = pclk * 24 / 8; break;
+		case 6: pclk = pclk * 30; break;
+		case 5: pclk = pclk * 24; break;
 		case 2:
 		default:
-			pclk = pclk * 18 / 8;
+			pclk = pclk * 18;
 			break;
 		}