Cleanup unused leftover from shield development.
These flags are not actually useful, nor used as dts connectors
are sufficient to control board to shield binding is
operational and dtc provides meaningful error message
when this is not the case.
Signed-off-by: Erwan Gouriou <erwan.gouriou@linaro.org>
In order to provide a way to control boards/shields compatibility,
provide connector flags.
One should select this flag in Kconfig.board to state connector
compatibility for the board.
Signed-off-by: Erwan Gouriou <erwan.gouriou@linaro.org>
David B. Kinder