Correct pitch alignment calculation

When we're aligning rowPitch to imagePitchAlignment, rowPitch is in pixels,
but imagePitchAlignment_ is bytes, so we end up overaligning the pitch.

Convert imagePitchAlignment_ to pixels before doing any logic.

Change-Id: Ia5ab9d54bed150fe974e86b060dbadc196165b29


[ROCm/clr commit: 696d00e71b]

projects/clr/rocclr/device/rocm/rocmemory.cpp

@@ -1143,7 +1143,7 @@ bool Image::createView(const Memory& parent) {
     }
 
     // Make sure the row pitch is aligned to pixels
-    rowPitch = elementSize * amd::alignUp(rowPitch, dev().info().imagePitchAlignment_);
+    rowPitch = elementSize * amd::alignUp(rowPitch, (dev().info().imagePitchAlignment_ / elementSize));
 
     status = hsa_ext_image_create_with_layout(
         dev().getBackendDevice(), &imageDescriptor_, deviceMemory_, permission_,