media: mtk-vpu: Drop unnecessary call to platform_get_resource()

mtk_vpu_probe() calls platform_get_resource(pdev, IORESOURCE_IRQ, ..)
to check if IRQ resource exists and later calls
platform_get_irq(pdev, ..) to get the actual IRQ.

This patch drops an unnecessary call to platform_get_resource() and
checks the return value of platform_get_irq(pdev, ..) to make sure the
IRQ line is valid.
Signed-off-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab@kernel.org>

drivers/media/platform/mtk-vpu/mtk_vpu.c

@@ -810,7 +810,6 @@ static int mtk_vpu_probe(struct platform_device *pdev)
 {
 	struct mtk_vpu *vpu;
 	struct device *dev;
-	struct resource *res;
 	int ret = 0;
 
 	dev_dbg(&pdev->dev, "initialization\n");
@@ -908,13 +907,10 @@ static int mtk_vpu_probe(struct platform_device *pdev)
 	init_waitqueue_head(&vpu->run.wq);
 	init_waitqueue_head(&vpu->ack_wq);
 
-	res = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
-	if (!res) {
-		dev_err(dev, "get IRQ resource failed.\n");
-		ret = -ENXIO;
+	ret = platform_get_irq(pdev, 0);
+	if (ret < 0)
 		goto free_p_mem;
-	}
-	vpu->reg.irq = platform_get_irq(pdev, 0);
+	vpu->reg.irq = ret;
 	ret = devm_request_irq(dev, vpu->reg.irq, vpu_irq_handler, 0,
 			       pdev->name, vpu);
 	if (ret) {