drm/i915: Remove redundant HAS_PSR checks

We only need to check for this in psr_enable, everything else is
already protect by the dev_priv->psr.enabled checks. Those need the
psr locking, but these functions are called infrequent enough that the
locking overhead is negligible.

Suggested by Chris Wilson.
Reviewed-by: Rodrigo Vivi <rodrigo.vivi@intel.com>
Cc: Chris Wilson <chris@chris-wilson.co.uk>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>

drivers/gpu/drm/i915/intel_dp.c

@@ -1772,11 +1772,6 @@ static bool intel_edp_psr_match_conditions(struct intel_dp *intel_dp)
 
 	dev_priv->psr.source_ok = false;
 
-	if (!HAS_PSR(dev)) {
-		DRM_DEBUG_KMS("PSR not supported on this platform\n");
-		return false;
-	}
-
 	if (IS_HASWELL(dev) && dig_port->port != PORT_A) {
 		DRM_DEBUG_KMS("HSW ties PSR to DDI A (eDP)\n");
 		return false;
@@ -1863,9 +1858,6 @@ void intel_edp_psr_disable(struct intel_dp *intel_dp)
 	struct drm_device *dev = intel_dp_to_dev(intel_dp);
 	struct drm_i915_private *dev_priv = dev->dev_private;
 
-	if (!HAS_PSR(dev))
-		return;
-
 	mutex_lock(&dev_priv->psr.lock);
 	if (!dev_priv->psr.enabled) {
 		mutex_unlock(&dev_priv->psr.lock);
@@ -1940,9 +1932,6 @@ void intel_edp_psr_invalidate(struct drm_device *dev,
 	struct drm_crtc *crtc;
 	enum pipe pipe;
 
-	if (!HAS_PSR(dev))
-		return;
-
 	mutex_lock(&dev_priv->psr.lock);
 	if (!dev_priv->psr.enabled) {
 		mutex_unlock(&dev_priv->psr.lock);
@@ -1967,9 +1956,6 @@ void intel_edp_psr_flush(struct drm_device *dev,
 	struct drm_crtc *crtc;
 	enum pipe pipe;
 
-	if (!HAS_PSR(dev))
-		return;
-
 	mutex_lock(&dev_priv->psr.lock);
 	if (!dev_priv->psr.enabled) {
 		mutex_unlock(&dev_priv->psr.lock);