memory: tegra: Make IRQ support opitonal

Make IRQ support optional to help unify the Tegra186 memory controller
driver with this one.
Signed-off-by: Thierry Reding <treding@nvidia.com>
Link: https://lore.kernel.org/r/20210602163302.120041-9-thierry.reding@gmail.comSigned-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@canonical.com>

drivers/memory/tegra/mc.c

@@ -750,6 +750,7 @@ static int tegra_mc_probe(struct platform_device *pdev)
 			return err;
 	}
 
+	if (mc->soc->ops && mc->soc->ops->handle_irq) {
 		mc->irq = platform_get_irq(pdev, 0);
 		if (mc->irq < 0)
 			return mc->irq;
@@ -765,6 +766,7 @@ static int tegra_mc_probe(struct platform_device *pdev)
 				err);
 			return err;
 		}
+	}
 
 	err = tegra_mc_reset_setup(mc);
 	if (err < 0)