media: platform: Improve getting and requesting irq flow for bug fixing

Delete platform_get_resource operation for irq.
Return actual value rather than EINVAL when fail to get and request
irq.
Reviewed-by: Tomasz Figa <tfiga@chromium.org>
Signed-off-by: Xia Jiang <xia.jiang@mediatek.com>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>

drivers/media/platform/mtk-jpeg/mtk_jpeg_core.c

@@ -1103,12 +1103,10 @@ static int mtk_jpeg_probe(struct platform_device *pdev)
 		return ret;
 	}
 
-	res = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
 	dec_irq = platform_get_irq(pdev, 0);
-	if (!res || dec_irq < 0) {
+	if (dec_irq < 0) {
 		dev_err(&pdev->dev, "Failed to get dec_irq %d.\n", dec_irq);
-		ret = -EINVAL;
-		return ret;
+		return dec_irq;
 	}
 
 	ret = devm_request_irq(&pdev->dev, dec_irq, mtk_jpeg_dec_irq, 0,
@@ -1116,7 +1114,6 @@ static int mtk_jpeg_probe(struct platform_device *pdev)
 	if (ret) {
 		dev_err(&pdev->dev, "Failed to request dec_irq %d (%d)\n",
 			dec_irq, ret);
-		ret = -EINVAL;
 		goto err_req_irq;
 	}