drm/panel: k101-im2ba02: Make use of the helper function dev_err_probe()

When possible use dev_err_probe help to properly deal with the
PROBE_DEFER error, the benefit is that DEFER issue will be logged
in the devices_deferred debugfs file.
And using dev_err_probe() can reduce code size, and the error value
gets printed.

Signed-off-by: Cai Huoqing <[e-mail]>
Acked-by: Icenowy Zheng <[e-mail]>
Signed-off-by: Sam Ravnborg <[e-mail]>
Link: https://patchwork.freedesktop.org/patch/msgid/[e-mail]

drivers/gpu/drm/panel/panel-feixin-k101-im2ba02.c

···
 
 	ret = devm_regulator_bulk_get(&dsi->dev, ARRAY_SIZE(ctx->supplies),
 				      ctx->supplies);
-	if (ret < 0) {
-		dev_err(&dsi->dev, "Couldn't get regulators\n");
-		return ret;
-	}
+	if (ret < 0)
+		return dev_err_probe(&dsi->dev, ret, "Couldn't get regulators\n");
 
 	ctx->reset = devm_gpiod_get(&dsi->dev, "reset", GPIOD_OUT_LOW);
-	if (IS_ERR(ctx->reset)) {
-		dev_err(&dsi->dev, "Couldn't get our reset GPIO\n");
-		return PTR_ERR(ctx->reset);
-	}
+	if (IS_ERR(ctx->reset))
+		return dev_err_probe(&dsi->dev, PTR_ERR(ctx->reset),
+				     "Couldn't get our reset GPIO\n");
 
 	drm_panel_init(&ctx->panel, &dsi->dev, &k101_im2ba02_funcs,
 		       DRM_MODE_CONNECTOR_DSI);