Rename device access functions

Rename functions that access devices to reflect the derived device
they return. This includes the base device::Device and the derived
gpu/pal/roc device classes in both NullDevice and Device forms. Change
to use the least derived versions to clarify what operations will be
available.

Change-Id: I1abb6bfed7efa24852bc8d0d49acaea357d8b5d0


[ROCm/clr commit: 001fd66cac]

projects/clr/rocclr/device/gpu/gpukernel.cpp

@@ -3045,7 +3045,7 @@ void HSAILKernel::initHsailArgs(const aclArgData* aclArg) {
 
 HSAILKernel::HSAILKernel(std::string name, HSAILProgram* prog, std::string compileOptions,
                          uint extraArgsNum)
-    : device::Kernel(prog->dev(), name, *prog),
+    : device::Kernel(prog->device(), name, *prog),
       compileOptions_(compileOptions),
       index_(0),
       code_(NULL),