memory: pl353: Fix error return code in pl353_smc_probe()

When no child nodes are matched, an appropriate error code -ENODEV should
be returned. However, we currently do not explicitly assign this error
code to 'err'. As a result, 0 was incorrectly returned.

Fixes: fee10bd2 ("memory: pl353: Add driver for arm pl353 static memory controller")
Reported-by: Hulk Robot <hulkci@huawei.com>
Signed-off-by: Zhen Lei <thunder.leizhen@huawei.com>
Link: https://lore.kernel.org/r/20210515040004.6983-1-thunder.leizhen@huawei.comSigned-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@canonical.com>

drivers/memory/pl353-smc.c

@@ -407,6 +407,7 @@ static int pl353_smc_probe(struct amba_device *adev, const struct amba_id *id)
 		break;
 	}
 	if (!match) {
+		err = -ENODEV;
 		dev_err(&adev->dev, "no matching children\n");
 		goto out_clk_disable;
 	}