drm/msm/dsi: Remove custom DSI config handling

Now that the only user is handled by common code, remove the option to
specify custom handlers through match data.

This is effectively a revert of commit:
5ae15e76271 ("drm/msm/dsi: Allow to specify dsi config as pdata")
Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Reviewed-by: Marijn Suijten <marijn.suijten@somainline.org>
Signed-off-by: Konrad Dybcio <konrad.dybcio@linaro.org>
Patchwork: https://patchwork.freedesktop.org/patch/527662/
Link: https://lore.kernel.org/r/20230307-topic-dsi_qcm-v6-7-70e13b1214fa@linaro.orgSigned-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>

drivers/gpu/drm/msm/dsi/dsi.c

@@ -172,10 +172,10 @@ static int dsi_dev_remove(struct platform_device *pdev)
 }
 
 static const struct of_device_id dt_match[] = {
-	{ .compatible = "qcom,mdss-dsi-ctrl", .data = NULL /* autodetect cfg */ },
+	{ .compatible = "qcom,mdss-dsi-ctrl" },
 
 	/* Deprecated, don't use */
-	{ .compatible = "qcom,dsi-ctrl-6g-qcm2290", .data = NULL },
+	{ .compatible = "qcom,dsi-ctrl-6g-qcm2290" },
 	{}
 };
 

drivers/gpu/drm/msm/dsi/dsi_host.c

@@ -214,10 +214,6 @@ static const struct msm_dsi_cfg_handler *dsi_get_config(
 	int ret;
 	u32 major = 0, minor = 0;
 
-	cfg_hnd = device_get_match_data(dev);
-	if (cfg_hnd)
-		return cfg_hnd;
-
 	ahb_clk = msm_clk_get(msm_host->pdev, "iface");
 	if (IS_ERR(ahb_clk)) {
 		pr_err("%s: cannot get interface clock\n", __func__);