kfdtest: Delete two useless exception tests

The InvalidPPR* tests are only useful for gfx801 right now, on which
they won't trigger exceptions. So they are not relevent in the
KFDExceptionTest category. In addition, given AccessPPRMem already tests
the PPR memory functionality, we can just delete those two tests.

Change-Id: Id5c6e23c4c0ce47a4f04e9e1f0fa9083e0a9d0e0
Signed-off-by: Yong Zhao <Yong.Zhao@amd.com>

tests/kfdtest/scripts/kfdtest.exclude

@@ -92,7 +92,6 @@ SDMA_BLACKLIST=\
 KV_QUEUE_BLACKLIST=\
 "KFDExceptionTest.InvalidBadAddress:"\
 "KFDExceptionTest.InvalidWriteAddress:"\
-"KFDExceptionTest.InvalidPPR*:"\
 "KFDLocalMemoryTest.*:"\
 "KFDEventTest.Signal*Event*:"\
 "KFDQMTest.CreateQueueStressSingleThreaded:"\