dt-bindings: clock: Add imx93 clock support

Add the clock dt-binding file for i.MX93.

Reviewed-by: Abel Vesa <abel.vesa@nxp.com>
Reviewed-by: Rob Herring <robh@kernel.org>
Reviewed-by: Stephen Boyd <sboyd@kernel.org>
Signed-off-by: Peng Fan <peng.fan@nxp.com>
Link: https://lore.kernel.org/r/20220228020908.2810346-2-peng.fan@oss.nxp.com


Signed-off-by: Abel Vesa <abel.vesa@nxp.com>