Refactor: Consolidate calls to hsaKmtAllocMemory

Route all device-visible system memory allocations through system_allocator.

Change-Id: I5e90a1bf491e432678a6d8ab1f9f3770734cbda1

runtime/hsa-runtime/core/common/shared.cpp

@@ -43,6 +43,6 @@
 #include "core/common/shared.h"
 
 namespace core {
-std::function<void*(size_t, size_t)> BaseShared::allocate_=nullptr;
-std::function<void(void*)> BaseShared::free_=nullptr;
+std::function<void*(size_t, size_t, uint32_t)> BaseShared::allocate_ = nullptr;
+std::function<void(void*)> BaseShared::free_ = nullptr;
 }