drm/i915/dmc_wl: Extract intel_dmc_wl_flush_release_work()

We will need to flush the release work from outside in an upcoming
change. Let's put that into a public interface and call it
intel_dmc_wl_flush_release_work().

Signed-off-by: Gustavo Sousa <[e-mail]>
Reviewed-by: Rodrigo Vivi <[e-mail]>
Link: https://patchwork.freedesktop.org/patch/msgid/[e-mail]
Signed-off-by: Rodrigo Vivi <[e-mail]>

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

···
 	if (!__intel_dmc_wl_supported(display))
 		return;
 
-	flush_delayed_work(&wl->work);
+	intel_dmc_wl_flush_release_work(display);
 
 	spin_lock_irqsave(&wl->lock, flags);
 
···
 
 out_unlock:
 	spin_unlock_irqrestore(&wl->lock, flags);
+}
+
+void intel_dmc_wl_flush_release_work(struct intel_display *display)
+{
+	struct intel_dmc_wl *wl = &display->wl;
+
+	if (!__intel_dmc_wl_supported(display))
+		return;
+
+	flush_delayed_work(&wl->work);
 }
 
 void intel_dmc_wl_get(struct intel_display *display, i915_reg_t reg)

drivers/gpu/drm/i915/display/intel_dmc_wl.h

···
 void intel_dmc_wl_init(struct intel_display *display);
 void intel_dmc_wl_enable(struct intel_display *display, u32 dc_state);
 void intel_dmc_wl_disable(struct intel_display *display);
+void intel_dmc_wl_flush_release_work(struct intel_display *display);
 void intel_dmc_wl_get(struct intel_display *display, i915_reg_t reg);
 void intel_dmc_wl_put(struct intel_display *display, i915_reg_t reg);
 void intel_dmc_wl_get_noreg(struct intel_display *display);