net: microchip: Make `lan743x_pm_suspend` function return right value
drivers/net/ethernet/microchip/lan743x_main.c: In function lan743x_pm_suspend: `ret` is set but not used. In fact, `pci_prepare_to_sleep` function value should be the right value of `lan743x_pm_suspend` function, therefore, fix it. Signed-off-by: NZheng Yongjun <zhengyongjun3@huawei.com> Signed-off-by: NDavid S. Miller <davem@davemloft.net>
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