Introduce support for the i.MX91 thermal monitoring unit, which features a single sensor for the CPU. The register layout differs from other chips, necessitating the creation of a dedicated file for this. This sensor provides a resolution of 1/64°C (6-bit fraction). For actual accuracy, refer to the datasheet, as it varies depending on the chip grade. Provide an interrupt for end of measurement and threshold violation and Contain temperature threshold comparators, in normal and secure address space, with direction and threshold programmability. Datasheet Link: https://www.nxp.com/docs/en/data-sheet/IMX91CEC.pdf Signed-off-by: Pengfei Li <pengfei.li_1@nxp.com> Signed-off-by: Peng Fan <peng.fan@nxp.com> Signed-off-by: Frank Li <Frank.Li@nxp.com> Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org> Link: https://patch.msgid.link/20251020-imx91tmu-v7-2-48d7d9f25055@nxp.com