ucc/hdlc: fix two little issue
1. modify bd_status from u32 to u16 in function hdlc_rx_done, because bd_status register is 16bits 2. write bd_length register before writing bd_status register Signed-off-by: NZhao Qiang <qiang.zhao@nxp.com> Signed-off-by: NDavid S. Miller <davem@davemloft.net>
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