linux-imx

drm/radeon: remove cayman_gpu_is_lockup

Since it is now identical to evergreen_gpu_is_lockup.

Signed-off-by: Christian König <deathsimple@vodafone.de>
Reviewed-by: Jerome Glisse <jglisse@redhat.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>