qcom-armv7a: disable Sony Xperia Castor dtb
qcom-armv7a: disable Sony Xperia Castor dtb

The dtb name for Castor has been changed upstream. Drop it for now,
to allow building all kernel versions.

Signed-off-by: Dmitry Baryshkov <2dcd7ecf02101ef1dca344c0511f3ffb180907c2@linaro.org>

ndechesne/meta-qcom,ndechesne/meta-qcom,ndechesne/meta-qcom