disp: msm: avoid sde_dbg HW access based on HW ownership

Add VM ownership checks before accessing the HW through the debugfs
path in sde dbg module to avoid illegal access. Set the ownership
status on bootup based on the VM.

Change-Id: I30f2a1eb7e049740f1f7fe3ed03aa411264ba7b3
Signed-off-by: Veera Sundaram Sankaran <veeras@codeaurora.org>

msm/sde_dbg.h

@@ -368,6 +368,12 @@ int sde_dbg_dsi_ctrl_register(void __iomem *base, const char *name);
  */
 void sde_dbg_set_sde_top_offset(u32 blk_off);
 
+/**
+ * sde_dbg_set_hw_ownership_status - set the VM HW ownership status
+ * @enable:	flag to control HW ownership status
+ */
+void sde_dbg_set_hw_ownership_status(bool enable);
+
 /**
  * sde_evtlog_set_filter - update evtlog filtering
  * @evtlog:	pointer to evtlog