Currently, cmakev2 evaluates each component using add_subdirectory with
the EXCLUDE_FROM_ALL option. The intention was to exclude all components
from being built by default unless they are explicitly linked to an
executable based on dependencies. This approach aims to avoid building
components that are included but not actually linked to the executable.
However, this has the side effect of preventing components from adding
their custom targets to the "all" target, which is used, for example, by
esp_phy. Generally, we should not restrict components from adding
targets to "all". Since components are only included if explicitly
requested by default, removing the EXCLUDE_FROM_ALL option should be
acceptable.
The downside is that if IDF_INCLUDE_ALL_COMPONENTS is set and the user
runs `idf.py build`, all components will be built, even if they are not
linked to the executable.
Signed-off-by: Frantisek Hrbata <frantisek.hrbata@espressif.com>
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