Refactor lockAndWriteDma to support goldfish-addess-space

Move goldfish_dma code to a separate function to add
another codepath for goldfish-address-space later.

Bug: 128324105
Test: make
Change-Id: I49c68b2266e1f3c687414e5937e1652d491945fb
Signed-off-by: Roman Kiryanov <[email protected]>
1 file changed