drm/i915/display: Use correct method to free crtc_state

Even though there is no leaking of resource here lets
just use the correct method to free crtc_state

Signed-off-by: Suraj Kandpal <[email protected]>
Signed-off-by: Ville Syrjälä <[email protected]>
Link: https://patchwork.freedesktop.org/patch/msgid/[email protected]

Author: surajk8

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

@@ -7,6 +7,7 @@
 #include <linux/string_helpers.h>
 
 #include "i915_reg.h"
+#include "intel_atomic.h"
 #include "intel_crtc.h"
 #include "intel_cx0_phy.h"
 #include "intel_de.h"
@@ -2006,7 +2007,7 @@ int vlv_force_pll_on(struct drm_i915_private *dev_priv, enum pipe pipe,
 		vlv_enable_pll(crtc_state);
 	}
 
-	kfree(crtc_state);
+	intel_crtc_destroy_state(&crtc->base, &crtc_state->uapi);
 
 	return 0;
 }