clk: imx: Add 519.75MHz frequency support for imx9 pll

For video pll, it may need 519.75MHz clock frequency for
the LVDS display usage. So add 519.75MHz frequency config
support for video pll.

Signed-off-by: Jacky Bai <ping.bai@nxp.com>
Reviewed-by: Peng Fan <peng.fan@nxp.com>
Link: https://lore.kernel.org/r/20230628061724.2056520-3-ping.bai@nxp.com


Signed-off-by: Abel Vesa <abel.vesa@linaro.org>