msm: kgsl: Correct the order of preemption packets

Current order:
IB1 batch, timestamp writes, SRM=NULL, CP_YIELD_ENABLE,
CP_CONTEXT_SWITCH_YIELD

Correct order:
IB1 batch, SRM=NULL, CP_YIELD_ENABLE, timestamp writes,
CP_CONTEXT_SWITCH_YIELD

Reason:
if preemption is initiated after the last checkpoint but
before SET_RENDER_MODE == NULL is executed, all of the PM4s
starting at the preamble of the check point will be replayed
up to the SRM == NULL, including an attempt to re-timestamp/
re-retire the last batch of IBs.

If what was intended here was to make sure that the IB batch
would be retired once then the SET_RENDER_MODE == NULL and
CP_YIELD_ENABLE should be placed immediately after IB_PFE packets
and before the time stamping PM4 packets in the ring buffer.

CRs-Fixed: 990078
Change-Id: I04a1a44f12dd3a09c50b4fe39e14a2bd636b24de
Signed-off-by: Harshdeep Dhatt <hdhatt@codeaurora.org>