Retire goldfish_dma_lock and goldfish_dma_unlock

goldfish_dma_lock does nothing in 4.4 and 4.14 kernels,
goldfish_dma_unlock is never called.

Bug: 128324105
Test: make
Change-Id: I9d55bbe8ad25922293b57c17be6a0f1c0b7a4096
Signed-off-by: Roman Kiryanov <[email protected]>
4 files changed