mmc: omap_hsmmc: Skip platform_get_resource_byname() for dt case

MMC driver probe will abort for DT case because of failed
platform_get_resource_byname() lookup. Fix it by skipping resource
lookup byname for device tree build.

Issue is hidden because hwmod populates the IO resources which
helps to succeed platform_get_resource_byname() and probe.
Signed-off-by: Santosh Shilimkar <santosh.shilimkar@ti.com>
Signed-off-by: Balaji T K <balajitk@ti.com>
Signed-off-by: Chris Ball <cjb@laptop.org>

drivers/mmc/host/omap_hsmmc.c

@@ -1911,6 +1911,7 @@ static int omap_hsmmc_probe(struct platform_device *pdev)
 
 	omap_hsmmc_conf_bus_power(host);
 
+	if (!pdev->dev.of_node) {
 		res = platform_get_resource_byname(pdev, IORESOURCE_DMA, "tx");
 		if (!res) {
 			dev_err(mmc_dev(host->mmc), "cannot get DMA TX channel\n");
@@ -1926,6 +1927,7 @@ static int omap_hsmmc_probe(struct platform_device *pdev)
 			goto err_irq;
 		}
 		rx_req = res->start;
+	}
 
 	dma_cap_zero(mask);
 	dma_cap_set(DMA_SLAVE, mask);