SWDEV-232894 Port hipMemcpy optimizations from HCC to VDI

Apply the optimization to change for OpenCL too.
Clean up some unnecessary checks.

Change-Id: I840261fe35baeeadeba7388e86779d482f509aad

rocclr/platform/context.cpp

@@ -50,8 +50,7 @@ Context::Context(const std::vector<Device*>& devices, const Info& info)
       info_(info),
       properties_(NULL),
       glenv_(NULL),
-      customHostAllocDevice_(NULL),
-      largeBar_(true) {
+      customHostAllocDevice_(NULL) {
   for (const auto& device : devices) {
     device->retain();
     if (customHostAllocDevice_ == NULL && device->customHostAllocator()) {
@@ -60,9 +59,6 @@ Context::Context(const std::vector<Device*>& devices, const Info& info)
     if (device->svmSupport()) {
       svmAllocDevice_.push_back(device);
     }
-    if (!device->isLargeBar()) {
-      largeBar_ = false;
-    }
   }
 
   if (svmAllocDevice_.size() > 1) {