rzv2h_rspi_calc_bitrate
actual_hz = rzv2h_rspi_calc_bitrate(clk_rate, spr, brdv);
actual_hz = rzv2h_rspi_calc_bitrate(clk_rate, spr, brdv);
controller->min_speed_hz = rzv2h_rspi_calc_bitrate(tclk_rate,
controller->max_speed_hz = rzv2h_rspi_calc_bitrate(tclk_rate,