clk: imx: pll14xx: consolidate rate calculation

clk: imx: pll14xx: consolidate rate calculation

The PLL driver has support for two different PLLs: The pll1416x and
the pll1443x. The latter has support for an additional kdiv value.
recalc_rate can be the same calculation when kdiv is assumed to be zero
for the PLL which doesn't support that value.

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
Reviewed-by: Abel Vesa <abel.vesa@nxp.com>
Link: https://lore.kernel.org/r/20220304125256.2125023-5-s.hauer@pengutronix.de
Signed-off-by: Abel Vesa <abel.vesa@nxp.com>