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.

Since ION duplicates the sg_list this issue does not appear to result in
an actual bug.

Signed-off-by: Liam Mark <lmark@codeaurora.org>
Acked-by: Laura Abbott <labbott@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>