MAINTAINERS: Update i.MX Clock Entry

Update file match pattern to include nxp,imx* and fsl,imx*.

Signed-off-by: Peng Fan <peng.fan@nxp.com>
Reviewed-by: Abel Vesa <abel.vesa@linaro.org>
Link: https://lore.kernel.org/r/20250707-imx95-blk-ctl-7-1-v3-5-c1b676ec13be@nxp.com


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