LC_LINK_WIDTH_RD_SHIFT
link_width >>= LC_LINK_WIDTH_RD_SHIFT;
lanes = (link_width_cntl & LC_LINK_WIDTH_RD_MASK) >> LC_LINK_WIDTH_RD_SHIFT;
lanes = (link_width_cntl & LC_LINK_WIDTH_RD_MASK) >> LC_LINK_WIDTH_RD_SHIFT;