SWDEV-322620 - Virtual Memory Management

Implement map/unmap for PAL backend
Create commands since PAL uses the IQueue to map/unmap

Change-Id: I97e26a7d28ae5e10774c9ca65307153100945621

rocclr/device/rocm/rocdevice.cpp

@@ -2287,15 +2287,6 @@ void Device::virtualFree(void* addr)
 {
 }
 
-void Device::virtualMap(void* addr, amd::Memory& mem, size_t size)
-{
-}
-
-void Device::virtualUnmap(void* addr, size_t size)
-{
-}
-
-
 // ================================================================================================
 bool Device::SetSvmAttributesInt(const void* dev_ptr, size_t count,
                               amd::MemoryAdvice advice, bool first_alloc, bool use_cpu) const {