msm: Enable ARM_HAS_SG_CHAIN for msm8x60

Change-Id: I939da0764098df7a9bd2fe223f960b0504761389
ion: tracing: add ftrace events for ion allocations

Add ftrace events for ion allocations to make it easier to profile
their performance.

Change-Id: I9f32e076cd50d7d3a145353dfcef74f0f6cdf8a0
Signed-off-by: Liam Mark <lmark@codeaurora.org>