The BCM11351 BRT board will never see the light of day. Remove the BRT
dts since it is not maintainable.
Reviewed-by: NAlex Elder <elder@linaro.org>
Reviewed-by: NChristian Daudt <bcm@fixthebug.org>
Reviewed-by: NMarkus Mayer <markus.mayer@linaro.org>
Signed-off-by: NMatt Porter <mporter@linaro.org>