msm: kgsl: Fix false timeout gpu faults

Sometimes ringbuffer timer is not getting updated due to
race with the preemption. This can cause  dispatcher to
detect false timeout gpu faults. Remove preempt state
check in adreno_dispatch_process_cmdqueue(), which will
allow to update ringbuffer timeout value irrespective of
the preemption state.

If the preemption completes successfully, preemption logic
updates timer for new_rb. We don’t need to care if it is
not updated for prev_rb. If preemption in-progress timer
will be updated for cur_rb in adreno_dispatch_process_cmdqueue().
In both cases we are taking care to update ringbuffer timer.
Hence we don’t need to check preemption state.

CRs-Fixed: 1095344
Change-Id: I0e0ec655e2262c4f499748ce35a8d710ed15b5e3
Signed-off-by: Hareesh Gundu <hareeshg@codeaurora.org>
Signed-off-by: Abhilash Kumar <krabhi@codeaurora.org>