drm/i915: Fix incorrect intel_ring_begin size in BSD ringbuffer.

The ring_begin API was taking a number of bytes, while all of our
other begin/end macros take number of dwords.  Change the API over to
dwords to prevent future bugs.

Signed-off-by: Zou Nan hai <[email protected]>
Signed-off-by: Eric Anholt <[email protected]>
2 files changed