gralloc: Use actual layer count from buffer descriptor

Use actual layer count passed in buffer descriptor for size
calculation in ValidateBufferSize and AllocateBUffer API.

Change-Id: I8a5bd8196cd3e34da5c24a111ced4161d6be6b1e
Signed-off-by: Karthi kandasamy <kartka@codeaurora.org>
2 files changed