disp: msm: sde: avoid tx wait during cwb disable and reset

Avoid TX wait during CWB encoder disable and delay
reset call after last CWB frame trigger.

Change-Id: I9f96d522cfe4205e0272b6b3fa9edd409cab3648
Signed-off-by: Dhaval Patel <pdhaval@codeaurora.org>

msm/sde/sde_encoder.h

@@ -573,6 +573,12 @@ static inline u32 sde_encoder_get_dfps_maxfps(struct drm_encoder *drm_enc)
 	return sde_enc->mode_info.dfps_maxfps;
 }
 
+/**
+ * sde_encoder_virt_reset - delay encoder virt reset
+ * @drm_enc:	Pointer to drm encoder structure
+ */
+void sde_encoder_virt_reset(struct drm_encoder *drm_enc);
+
 /**
  * sde_encoder_get_kms - retrieve the kms from encoder
  * @drm_enc:    Pointer to drm encoder structure