drm/i915/opregion: bail out early for systems with no opregion VBT

Reduce indent. No functional changes.
Reviewed-by: Bob Paauwe <bob.j.paauwe@intel.com>
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/1490783578-6065-1-git-send-email-jani.nikula@intel.com

drivers/gpu/drm/i915/intel_opregion.c

@@ -920,6 +920,8 @@ int intel_opregion_setup(struct drm_i915_private *dev_priv)
 	char buf[sizeof(OPREGION_SIGNATURE)];
 	int err = 0;
 	void *base;
+	const void *vbt = NULL;
+	u32 vbt_size = 0;
 
 	BUILD_BUG_ON(sizeof(struct opregion_header) != 0x100);
 	BUILD_BUG_ON(sizeof(struct opregion_acpi) != 0x100);
@@ -972,9 +974,8 @@ int intel_opregion_setup(struct drm_i915_private *dev_priv)
 	if (mboxes & MBOX_ASLE_EXT)
 		DRM_DEBUG_DRIVER("ASLE extension supported\n");
 
-	if (!dmi_check_system(intel_no_opregion_vbt)) {
-		const void *vbt = NULL;
-		u32 vbt_size = 0;
+	if (dmi_check_system(intel_no_opregion_vbt))
+		goto out;
 
 	if (opregion->header->opregion_ver >= 2 && opregion->asle &&
 	    opregion->asle->rvda && opregion->asle->rvds) {
@@ -992,13 +993,12 @@ int intel_opregion_setup(struct drm_i915_private *dev_priv)
 	} else {
 		vbt = base + OPREGION_VBT_OFFSET;
 		/*
-			 * The VBT specification says that if the ASLE ext
-			 * mailbox is not used its area is reserved, but
-			 * on some CHT boards the VBT extends into the
-			 * ASLE ext area. Allow this even though it is
-			 * against the spec, so we do not end up rejecting
-			 * the VBT on those boards (and end up not finding the
-			 * LCD panel because of this).
+		 * The VBT specification says that if the ASLE ext mailbox is
+		 * not used its area is reserved, but on some CHT boards the VBT
+		 * extends into the ASLE ext area. Allow this even though it is
+		 * against the spec, so we do not end up rejecting the VBT on
+		 * those boards (and end up not finding the LCD panel because of
+		 * this).
 		 */
 		vbt_size = (mboxes & MBOX_ASLE_EXT) ?
 			OPREGION_ASLE_EXT_OFFSET : OPREGION_SIZE;
@@ -1009,8 +1009,8 @@ int intel_opregion_setup(struct drm_i915_private *dev_priv)
 			opregion->vbt_size = vbt_size;
 		}
 	}
-	}
 
+out:
 	return 0;
 
 err_out: