disp: msm: refactor DSI debugbus dumping

Move DSI debugbus dumping logic from DSI driver to sde_dbg
in order to utilize the framework in place for debugbuses.

This allows for more control over the dumping logic, such
as where the dump data is stored(memory/console), via nodes
populated in debugfs.

Change-Id: Iff507fdaa02d26af26743e81f6048aec57c09a76
Signed-off-by: Steve Cohen <cohens@codeaurora.org>

msm/dsi/dsi_ctrl_hw_cmn.c

@@ -568,20 +568,6 @@ void dsi_ctrl_hw_cmn_video_engine_setup(struct dsi_ctrl_hw *ctrl,
 	DSI_CTRL_HW_DBG(ctrl, "Video engine setup done\n");
 }
 
-void dsi_ctrl_hw_cmn_debug_bus(struct dsi_ctrl_hw *ctrl, u32 *entries, u32 size)
-{
-	u32 reg = 0, i = 0;
-
-	for (i = 0; i < size; i++) {
-		DSI_W32(ctrl, DSI_DEBUG_BUS_CTL, entries[i]);
-		/* make sure that debug test point is enabled */
-		wmb();
-		reg = DSI_R32(ctrl, DSI_DEBUG_BUS_STATUS);
-		DSI_CTRL_HW_INFO(ctrl, "debug bus ctrl: 0x%x status:0x%x\n",
-				entries[i], reg);
-	}
-}
-
 /**
  * cmd_engine_setup() - setup dsi host controller for command mode
  * @ctrl:          Pointer to the controller host hardware.