arm64: dts: qcom: apq8016-sbc: enable bam dma node.

This patch enables bam dma node, dma is used for both tx and rx on spi
and on high speed serial.

Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@linaro.org>
Signed-off-by: Andy Gross <andy.gross@linaro.org>