ARM: dts: msm: Enable zone dma flag for sdm660/630

IPA v2.6 hardware has 32 bit limitation,
enable zone dma flag to get a kernel
memory allocated in 32 bit space.

Change-Id: I61fc2d28ef4e690a7d03ad68c308a6b6fe5129cf
Acked-by: Mohammed Javid <mjavid@qti.qualcomm.com>
Signed-off-by: Utkarsh Saxena <usaxena@codeaurora.org>