drm/i915/gt: Restore clear-residual mitigations for Ivybridge, Baytrail

The mitigation is required for all gen7 platforms, now that it does not
cause GPU hangs, restore it for Ivybridge and Baytrail.

Fixes: 47f8253d2b89 ("drm/i915/gen7: Clear all EU/L3 residual contexts")
Signed-off-by: Chris Wilson <[e-mail]>
Cc: Mika Kuoppala <[e-mail]>
Cc: Prathap Kumar Valsan <[e-mail]>
Cc: Akeem G Abodunrin <[e-mail]>
Cc: Bloomfield Jon <[e-mail]>
Reviewed-by: Akeem G Abodunrin <[e-mail]>
Reviewed-by: Rodrigo Vivi <[e-mail]>
Link: https://patchwork.freedesktop.org/patch/msgid/[e-mail]
(cherry picked from commit 008ead6ef8f588a8c832adfe9db201d9be5fd410)
Signed-off-by: Jani Nikula <[e-mail]>

drivers/gpu/drm/i915/gt/intel_ring_submission.c

···
 
 	GEM_BUG_ON(timeline->hwsp_ggtt != engine->status_page.vma);
 
-	if (IS_HASWELL(engine->i915) && engine->class == RENDER_CLASS) {
+	if (IS_GEN(engine->i915, 7) && engine->class == RENDER_CLASS) {
 		err = gen7_ctx_switch_bb_init(engine);
 		if (err)
 			goto err_ring_unpin;