drm/i915: pass dev_priv explicitly to TRANS_EXITLINE

Avoid the implicit dev_priv local variable use, and pass dev_priv
explicitly to the TRANS_EXITLINE register macro.

Reviewed-by: Rodrigo Vivi <rodrigo.vivi@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/eb1e5fe155daf2d271af76e683a1f3f33e34403a.1714471597.git.jani.nikula@intel.com


Signed-off-by: Jani Nikula <jani.nikula@intel.com>