dt-bindings: clock: imx93: Drop IMX93_CLK_END macro definition

IMX93_CLK_END should be dropped as it is not part of the ABI.

Signed-off-by: Pengfei Li <pengfei.li_1@nxp.com>
Acked-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Acked-by: Peng Fan <peng.fan@nxp.com>
Acked-by: Conor Dooley <conor.dooley@microchip.com>
Link: https://lore.kernel.org/r/20241023184651.381265-3-pengfei.li_1@nxp.com


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