ARM: dts: msm: Default none mode for primary USB controllers on SA8155 and SA6155

Keep the primary USB controllers in 'none' mode by default on
target bootup. This is required to pass freeze callback when
target resumes from hibernation and bare kernel is booting.
We will keep the controller in peripheral mode via userspace
for full boot chain.

Change-Id: Ib419ed9c4b98968f3944f7266c8f9f56db44ffe1
Signed-off-by: Ajay Agarwal <ajaya@codeaurora.org>