[PATCH 12/25] serial: sh-sci: Merge sci_scbrr_calc() and sci_baud_calc_hscif()

For low bit rates, the for-loop that reduces the divider returned by sci_scbrr_calc() and picks the clock select value may terminate without finding suitable values, leading to out-of-range divider and clock select values. sci_baud_calc_hscif() doesn't suffer from this problem, as it correctly

[PATCH 12/25] serial: sh-sci: Merge sci_scbrr_calc() and sci_baud_calc_hscif()

For low bit rates, the for-loop that reduces the divider returned by sci_scbrr_calc() and picks the clock select value may terminate without finding suitable values, leading to out-of-range divider and clock select values. sci_baud_calc_hscif() doesn't suffer from this problem, as it correctly