ARM: dts: msm: Add q6 hfi interface for msm8226 target

For msm8226, add q6 interface and increase adsp memory
size to 42MB for hybrid hevc decoder support.

Change-Id: I525b6e01e10dec3ad001e6ecbd121bf171e14523
Signed-off-by: Arun Menon <avmenon@codeaurora.org>