Some dependency issues need to be fixed.

[tprrt]

Re-open an issue has been opened on meta-atmel:

• ARM layers that provide OP-TEE recipes are missing from the layer dependencies.
• Nginx is provided by meta-webserver and is not part of the BSP; it may be better to use a dynamic layer to include it.
• libp11 is provided by met-oe; it may be better to use a dynamic layer to include it.
• meta-networking is also required to build sama7g5ek-ospi images, because it provides phytool packages; even though it is not a BSP package.
• Moreover, the sama7g5ek-ospi BSP depends on the 'systemd' distro features to provide systemd-analysis.
• :forcevariable shouldn't be used in recipes and configurations; otherwise, it is not possible to override the variable. This operator should only be used for debugging, continuous integration, or development, especially in IMAGE_INSTALL:forcevariable in sama7g5ek-ospi.conf.
• IMAGE_FEATURES defined in sama7g5ek-ospi.conf should be specified in image recipes (or distro or global configuration), not in the machine configuration.