drm/i915: Restore default settings for enable_psr and disable_power_w…

…ell on FreeBSD

[Why]
They used to be disabled because it broke the console: the display was
not refreshed, except when doing a vt-switch.

With the new vt(4) integration which uses the whole drm_fb_helper code,
this seems to be fixed.

Fixes freebsd#17.

drivers/gpu/drm/i915/i915_params.h

@@ -51,13 +51,6 @@ struct drm_printer;
  */
 #ifdef __FreeBSD__
 /* Changes in default values in I915_PARAMS_FOR_EACH below:
- *
- *   enable_psr: -1 -> 0
- *   the console screen doesn't refresh otherwise (the computer remains
- *   responsive).
- *
- *   disable_power_well: -1 -> 0
- *   ?
  *
  *   enable_guc: -1 -> 0
  *   GuC initialization freeze the computer.
@@ -71,10 +64,10 @@ struct drm_printer;
 	param(int, vbt_sdvo_panel_type, -1, 0400) \
 	param(int, enable_dc, -1, 0400) \
 	param(int, enable_fbc, -1, 0600) \
-	param(int, enable_psr, 0, 0600) \
+	param(int, enable_psr, -1, 0600) \
 	param(bool, psr_safest_params, false, 0400) \
 	param(bool, enable_psr2_sel_fetch, true, 0400) \
-	param(int, disable_power_well, 0, 0400) \
+	param(int, disable_power_well, -1, 0400) \
 	param(int, enable_ips, 1, 0600) \
 	param(int, invert_brightness, 0, 0600) \
 	param(int, enable_guc, 0, 0400) \