clk: clocking-wizard: calculate dividers fractional parts

clk: clocking-wizard: calculate dividers fractional parts

Calculate dividers fractional parts to optimally modulate output frequency.
Clocking wizard supports having multiplier m and divisors d and o.
Currently the fractional parts of m and o are not utilised.
For the pixel clock usecases a higher accuracy is needed..
Adding support for m and o to have fractional values.

Co-developed-by: Anatoliy Klymenko <anatoliy.klymenko@amd.com>
Signed-off-by: Anatoliy Klymenko <anatoliy.klymenko@amd.com>
Signed-off-by: Shubhrajyoti Datta <shubhrajyoti.datta@amd.com>
Tested-by: Anatoliy Klymenko <anatoliy.klymenko@amd.com>
Link: https://lore.kernel.org/r/20250106082937.29555-1-shubhrajyoti.datta@amd.com
Signed-off-by: Stephen Boyd <sboyd@kernel.org>