When HIP_ENABLE_DEFERRED_LOADING=0, many global variables will be
referenced but they are not initialized in that early time. The patch
will use constexpr to initialze global constant varables in compile
time.
Change-Id: I9d538b7abc6a0ce700ec3332b97fc144db5fc1ef
[ROCm/clr commit: fdef6f722f]
The last commit to replace the cl_* types with standard types
failed to correct issues introduced in the PAL and GPU backend.
Change-Id: I926997234dfbe346fc165a7bc4e1b8aabab7bac5
[ROCm/clr commit: b81816f482]