drm/i915/lvds: Use intel_de_rmw()

Replace the hand rolled rmw stuff with intel_de_rmw().
Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20230130180540.8972-3-ville.syrjala@linux.intel.comReviewed-by: Jani Nikula <jani.nikula@intel.com>

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

@@ -320,11 +320,9 @@ static void intel_enable_lvds(struct intel_atomic_state *state,
 	struct intel_lvds_encoder *lvds_encoder = to_lvds_encoder(encoder);
 	struct drm_i915_private *dev_priv = to_i915(dev);
 
-	intel_de_write(dev_priv, lvds_encoder->reg,
-		       intel_de_read(dev_priv, lvds_encoder->reg) | LVDS_PORT_EN);
+	intel_de_rmw(dev_priv, lvds_encoder->reg, 0, LVDS_PORT_EN);
 
-	intel_de_write(dev_priv, PP_CONTROL(0),
-		       intel_de_read(dev_priv, PP_CONTROL(0)) | PANEL_POWER_ON);
+	intel_de_rmw(dev_priv, PP_CONTROL(0), 0, PANEL_POWER_ON);
 	intel_de_posting_read(dev_priv, lvds_encoder->reg);
 
 	if (intel_de_wait_for_set(dev_priv, PP_STATUS(0), PP_ON, 5000))
@@ -342,14 +340,12 @@ static void intel_disable_lvds(struct intel_atomic_state *state,
 	struct intel_lvds_encoder *lvds_encoder = to_lvds_encoder(encoder);
 	struct drm_i915_private *dev_priv = to_i915(encoder->base.dev);
 
-	intel_de_write(dev_priv, PP_CONTROL(0),
-		       intel_de_read(dev_priv, PP_CONTROL(0)) & ~PANEL_POWER_ON);
+	intel_de_rmw(dev_priv, PP_CONTROL(0), PANEL_POWER_ON, 0);
 	if (intel_de_wait_for_clear(dev_priv, PP_STATUS(0), PP_ON, 1000))
 		drm_err(&dev_priv->drm,
 			"timed out waiting for panel to power off\n");
 
-	intel_de_write(dev_priv, lvds_encoder->reg,
-		       intel_de_read(dev_priv, lvds_encoder->reg) & ~LVDS_PORT_EN);
+	intel_de_rmw(dev_priv, lvds_encoder->reg, LVDS_PORT_EN, 0);
 	intel_de_posting_read(dev_priv, lvds_encoder->reg);
 }