drm/i915: Rename global i915 to i915_modparams

Our global struct with params is named exactly the same way
as new preferred name for the drm_i915_private function parameter.
To avoid such name reuse lets use different name for the global.

v5: pure rename
v6: fix

Credits-to: Coccinelle

@@
identifier n;
@@
(
-	i915.n
+	i915_modparams.n
)

Signed-off-by: Michal Wajdeczko <michal.wajdeczko@intel.com>
Cc: Jani Nikula <jani.nikula@intel.com>
Cc: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Tvrtko Ursulin <tvrtko.ursulin@intel.com>
Cc: Ville Syrjala <ville.syrjala@intel.com>
Cc: Joonas Lahtinen <joonas.lahtinen@linux.intel.com>
Acked-by: Joonas Lahtinen <joonas.lahtinen@linux.intel.com>
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20170919193846.38060-1-michal.wajdeczko@intel.com
diff --git a/drivers/gpu/drm/i915/intel_engine_cs.c b/drivers/gpu/drm/i915/intel_engine_cs.c
index 3d135c3..d755a2a 100644
--- a/drivers/gpu/drm/i915/intel_engine_cs.c
+++ b/drivers/gpu/drm/i915/intel_engine_cs.c
@@ -153,7 +153,7 @@ __intel_engine_context_size(struct drm_i915_private *dev_priv, u8 class)
 		case 9:
 			return GEN9_LR_CONTEXT_RENDER_SIZE;
 		case 8:
-			return i915.enable_execlists ?
+			return i915_modparams.enable_execlists ?
 			       GEN8_LR_CONTEXT_RENDER_SIZE :
 			       GEN8_CXT_TOTAL_SIZE;
 		case 7:
@@ -301,7 +301,7 @@ int intel_engines_init(struct drm_i915_private *dev_priv)
 			&intel_engine_classes[engine->class];
 		int (*init)(struct intel_engine_cs *engine);
 
-		if (i915.enable_execlists)
+		if (i915_modparams.enable_execlists)
 			init = class_info->init_execlists;
 		else
 			init = class_info->init_legacy;