drm/i915: Propagate "_release" function name suffix down

Replace mixed "_fini"/"_cleanup"/"_cleanup_hw" suffixes found in names
of functions called from i915_driver_release() with "_release" suffix
consistently.  This provides better code readability, especially
helpful when trying to work out which phase the code is in.

Functions names starting with "i915_driver_", i.e., those defined in
drivers/gpu/dri/i915/i915_drv.c, just have their "cleanup" or "fini"
parts of their names replaced with the "_release" suffix, while names
of functions coming from other source files have been suffixed with
"_driver_release" to avoid ambiguity with other possible .release entry
points.

v2: early_probe pairs better with late_release (Chris)
v3: fix typo in commit message (Joonas)

Suggested-by: Chris Wilson <chris@chris-wilson.co.uk>
Signed-off-by: Janusz Krzysztofik <janusz.krzysztofik@linux.intel.com>
Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk>
Reviewed-by: Joonas Lahtinen <joonas.lahtinen@linux.intel.com>
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Link: https://patchwork.freedesktop.org/patch/msgid/20190712112429.740-5-janusz.krzysztofik@linux.intel.com

drivers/gpu/drm/i915/i915_gem.c

@@ -1620,7 +1620,7 @@ void i915_gem_fini_hw(struct drm_i915_private *dev_priv)
 	i915_gem_drain_freed_objects(dev_priv);
 }
 
-void i915_gem_fini(struct drm_i915_private *dev_priv)
+void i915_gem_driver_release(struct drm_i915_private *dev_priv)
 {
 	mutex_lock(&dev_priv->drm.struct_mutex);
 	intel_engines_cleanup(dev_priv);