SWDEV-384557 - Use toggle for SDMA query

- Use HIP_USE_SDMA_QUERY env var toggle for new API use. Env var is 0 by
default

Change-Id: If725a0c41e15f78a1a6c3f47942954fe9240b4db

rocclr/utils/flags.hpp

@@ -285,7 +285,9 @@ release(bool, HIPRTC_USE_RUNTIME_UNBUNDLER, false,                            \
 release(size_t, HIP_INITIAL_DM_SIZE, 8 * Mi,                                  \
         "Set initial heap size for device malloc.")                           \
 release(bool, HIP_FORCE_DEV_KERNARG, 0,                                       \
-         "Force device mem for kernel args")
+         "Force device mem for kernel args")                                  \
+release(bool, HIP_USE_SDMA_QUERY, 0,                                          \
+         "Use SDMA query API to make copy decisions")
 
 namespace amd {