msm: kgsl: Fix the syncpoint_fence trace

We should have a corresponding syncpoint_fence trace
for every syncpoint_fence_expire trace. In case the
fence is already signaled then make sure to have
syncpoint_fence trace before syncpoint_fence_expire
trace.

Also take an extra refcount for fence which will make
sure that the fence pointer is valid in the trace even
if the fence is signaled.

Change-Id: I2fd8f91c800f89a4a64813a6908eaa0445cf548b
Signed-off-by: Sunil Khatri <sunilkh@codeaurora.org>