msm: kgsl: Fix compilation dependencies on SYNC_FILE

When SYNC_FILE is not defined we see compilation errors in
kernel due to multiple redefinition of functions, also fix the
input arguments of kgsl_sync_fence_async_wait.

Change-Id: I7c6ec437968b33715209ebfe6834dc0decf18e55
Signed-off-by: Sunil Khatri <sunilkh@codeaurora.org>