Revert "drm/i915/opregion: check port number bounds for SWSCI display power state"

This reverts commit b84857c06e.

5.10 stable contains 2 identical commits:
1. commit eb7bf11e8e ("drm/i915/opregion: check port number bounds for SWSCI display power state")
2. commit b84857c06e ("drm/i915/opregion: check port number bounds for SWSCI display power state")

Both commits add separate checks for the same condition. Revert the 2nd
redundant check to match upstream, which only has one check.

Signed-off-by: Greg Thelen <gthelen@google.com>
Signed-off-by: Yu Liao <liaoyu15@huawei.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/gpu/drm/i915/display/intel_opregion.c

@@ -376,21 +376,6 @@ int intel_opregion_notify_encoder(struct intel_encoder *intel_encoder,
 		return -EINVAL;
 	}
 
-	/*
-	 * The port numbering and mapping here is bizarre. The now-obsolete
-	 * swsci spec supports ports numbered [0..4]. Port E is handled as a
-	 * special case, but port F and beyond are not. The functionality is
-	 * supposed to be obsolete for new platforms. Just bail out if the port
-	 * number is out of bounds after mapping.
-	 */
-	if (port > 4) {
-		drm_dbg_kms(&dev_priv->drm,
-			    "[ENCODER:%d:%s] port %c (index %u) out of bounds for display power state notification\n",
-			    intel_encoder->base.base.id, intel_encoder->base.name,
-			    port_name(intel_encoder->port), port);
-		return -EINVAL;
-	}
-
 	if (!enable)
 		parm |= 4 << 8;