serial: 8250_dw: Check the data->pclk when get apb_pclk
It should check the data->pclk, not data->clk when get apb_pclk. Fixes: c8ed99d4("serial: 8250_dw: Add support for deferred probing") Signed-off-by: Kefeng Wang <wangkefeng.wang@huawei.com> Tested-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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