drm/i915/guc: enable GuC loading & submission by default

The recent patch
. fce91f2 drm/i915/guc: add enable_guc_loading parameter
enabled GuC loading and submission by default, but as issues
were found with warnings being issued during suspend-resume
cycles, GuC loading was disabled by default, by patch
. 2335986 drm/i915/guc: Disable automatic GuC firmware loading

Those warnings have been resolved, so this patch re-enables GuC
loading and submission by default.

Signed-off-by: Dave Gordon <david.s.gordon@intel.com>
Reviewed-by: Tvrtko Ursulin <tvrtko.ursulin@intel.com>
Signed-off-by: Tvrtko Ursulin <tvrtko.ursulin@intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/1465287291-2187-1-git-send-email-david.s.gordon@intel.com

drivers/gpu/drm/i915/i915_params.c

@@ -54,8 +54,8 @@ struct i915_params i915 __read_mostly = {
 	.verbose_state_checks = 1,
 	.nuclear_pageflip = 0,
 	.edp_vswing = 0,
-	.enable_guc_loading = 0,
-	.enable_guc_submission = 0,
+	.enable_guc_loading = -1,
+	.enable_guc_submission = -1,
 	.guc_log_level = -1,
 	.enable_dp_mst = true,
 	.inject_load_failure = 0,
@@ -202,12 +202,12 @@ MODULE_PARM_DESC(edp_vswing,
 module_param_named_unsafe(enable_guc_loading, i915.enable_guc_loading, int, 0400);
 MODULE_PARM_DESC(enable_guc_loading,
 		"Enable GuC firmware loading "
-		"(-1=auto, 0=never [default], 1=if available, 2=required)");
+		"(-1=auto [default], 0=never, 1=if available, 2=required)");
 
 module_param_named_unsafe(enable_guc_submission, i915.enable_guc_submission, int, 0400);
 MODULE_PARM_DESC(enable_guc_submission,
 		"Enable GuC submission "
-		"(-1=auto, 0=never [default], 1=if available, 2=required)");
+		"(-1=auto [default], 0=never, 1=if available, 2=required)");
 
 module_param_named(guc_log_level, i915.guc_log_level, int, 0400);
 MODULE_PARM_DESC(guc_log_level,