Correct Flush(/Invalidate)MappedMemoryRange

Correct Flush(/Invalidate)MappedMemoryRange

This change replaces memory mapping calls that used calculated or
constant size with flushAlloc/invalidateAlloc helper functions.
Dedicated memory mapping tests were not affected by this change
same as tests that for memory mapping already used VK_WHOLE_SIZE
and tests that calculated mapping size basing on nonCoherentAtomSize.

Components: Vulkan

VK-GL-CTS issue: 78

Affects:
dEQP-VK.*

Change-Id: Idc20719e0c3a942459290b7c5cbea6ac1d5a2588