Add a backward-compatible idf_component_register function. This is
necessary to enable existing components to integrate with cmakev2. Note
that, by design, when the configuration is evaluated first, the KCONFIG
and KCONFIG_PROJBUILD options become obsolete, and an error is reported
if non-default configuration file names are specified.
Signed-off-by: Frantisek Hrbata <frantisek.hrbata@espressif.com>
69d5884838