drm/msm/dpu: point sc8280xp_dpu_cfg to sc8280xp_regdma

SC8280XP configuration missed the reg_dma configuration. We do not use
regdma for now, but let's put the correct pointer anyway.

Fixes: 4a352c2f ("drm/msm/dpu: Introduce SC8280XP")
Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Reviewed-by: Abhinav Kumar <quic_abhinavk@quicinc.com>
Patchwork: https://patchwork.freedesktop.org/patch/518790/
Link: https://lore.kernel.org/r/20230118020455.1689929-1-dmitry.baryshkov@linaro.orgSigned-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>

drivers/gpu/drm/msm/disp/dpu1/dpu_hw_catalog.c

@@ -2680,6 +2680,8 @@ static const struct dpu_mdss_cfg sc8280xp_dpu_cfg = {
 	.intf = sc8280xp_intf,
 	.vbif_count = ARRAY_SIZE(sdm845_vbif),
 	.vbif = sdm845_vbif,
+	.reg_dma_count = 1,
+	.dma_cfg = &sc8280xp_regdma,
 	.perf = &sc8280xp_perf_data,
 	.mdss_irqs = IRQ_SC8280XP_MASK,
 };