Revert "dts: msm8974: Add dma channels for blsp2_i2c1 node"

Revert this commit to fix regressions on non-dragonboard MSM8974 boards.
This will be put back in after the correct fixes to the bam driver are
accepted that allow remote processor control of the main control registers.

This reverts commit 0a5d0f85.

Signed-off-by: Andy Gross <andy.gross@linaro.org>