msm: kgsl: fix paren placement leading to fence timeout

The incorrect paren placement can lead to a fence timeout
because the last_timestamp is always written. As a result
the last_timestamp could be corrupted by writing an old
value leading to a future timestamp_cmp indicating that a
signaled sync pt was unsignaled.
deadline: Allow 0ms deadline latency, increase the read speed

Change a timer compare from after to after-equals, thus allowing
0 timeout and making deadline schedule FIFO.

Signed-off-by: xiaobing tu <xiaobing.tu@intel.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Signed-off-by: Francisco Franco <franciscofranco.1990@gmail.com>