drm/nouveau/abi16: introduce locked variant of nouveau_abi16_get()

USIF already takes the client mutex, but will need access to ABI16 data
in order to provide some limited interoperability.

Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
This commit is contained in:
Ben Skeggs 2015-11-03 10:55:45 +10:00
commit 786a57ef2c