[CONFIGS][C25] Add configuration files for Embedded and Things flavors

This MR adds initial support for C25 Q7 module.

Other MRs:

• meta-seco-imx: clea-os/layers/seco/meta-seco-imx!281
• u-boot-seco-imx:clea-os/bsp/nxp/u-boot-seco-imx!159
• linux-seco-imx: clea-os/bsp/nxp/linux-seco-imx!197
• imx-mkimage: clea-os/bsp/nxp/tools/imx-mkimage!54