dt-bindings: timer: fsl,ftm-timer: Convert to dtschema

Convert the Freescale FlexTimer Module (FTM) Timer bindings to yaml.

Cc: Daniel Baluta <daniel.baluta@nxp.com>
Signed-off-by: Animesh Agarwal <animeshagarwal28@gmail.com>
Reviewed-by: Rob Herring (Arm) <robh@kernel.org>
Link: https://lore.kernel.org/r/20240730171336.99090-1-animeshagarwal28@gmail.com


Signed-off-by: Rob Herring (Arm) <robh@kernel.org>