gpu: pvr: Update to DDK 1.8@550175

 - http://b/5568038 "Prime lock-up: IMGSRV WaitUntilBufObjNotUsed"
   Improve debugging situation for this and other similar lockups.
   Dump microkernel trace and call BUG() when ukernel cleanup or
   initialisation times out.
 - Turn on CONFIG_PVR_NEED_PVR_ASSERT in tuna_defconfig. This should
   help us get better firmware traces from bugreports.

Change-Id: I781683f4bad9eaba56397af99cd5f795579f78dc
5 files changed