The begin[end]_cpu_access handles cache coherency.
However the kmap is always called here and it just
makes unnecessary overhead of kmap.
We don't need to call kmap on begin[end]_cpu_access
because ION no longer supports dma_buf_kmap callback
on ion dma, so remove it.
Bug: 158635261
Signed-off-by: Hyesoo YU <hyesoo.yu@samsung.com>
Change-Id: I8a9a1715da2c0d7df59a3abe8790614b07f55fe6
b8018578d1