disp: msm: sde: move dsc implementation to a new file

This change moves the DSC implementation into a separate file.
This is required to add support for new compression algorithms.
This cleanup change also, moves struct sde_encoder_virt
declaration to the encoder header file.

Change-Id: Idc3b96e65fcce2a7ee6e17af604cec0cb574f6f7
Signed-off-by: Abhijit Kulkarni <kabhijit@codeaurora.org>

msm/sde/sde_crtc.c

@@ -2078,13 +2078,13 @@ static void sde_crtc_frame_event_cb(void *data, u32 event)
 	struct sde_crtc *sde_crtc;
 	struct msm_drm_private *priv;
 	struct sde_crtc_frame_event *fevent;
-	struct sde_crtc_frame_event_cb_data *cb_data;
+	struct sde_kms_frame_event_cb_data *cb_data;
 	struct drm_plane *plane;
 	u32 ubwc_error;
 	unsigned long flags;
 	u32 crtc_id;
 
-	cb_data = (struct sde_crtc_frame_event_cb_data *)data;
+	cb_data = (struct sde_kms_frame_event_cb_data *)data;
 	if (!data) {
 		SDE_ERROR("invalid parameters\n");
 		return;