staging: android: ion: Initialize dma_address of new sg list

Fix the dup_sg_table function to initialize the dma_address of the new
sg list entries instead of the source dma_address entries.

Change-Id: I6a102858f17c186dce2f0da46f73aa8c8c1169ed
Signed-off-by: Liam Mark <lmark@codeaurora.org>