disp: hdcp: add driver to handle userspace interactions

Create a new driver to handle sysfs and topology events that are
related to application/userspace layer interactions for HDCP
functionality. In turn, this will create a clear separation from
the HDCP QSEECOM layer that defines the communication mechanism
between the kernel and the TrustZone layers.

This implementation is based on a snapshot of the msm_hdcp
driver as of this commit 10ffbfa2c7e03c09 ("drm/msm/dp: Snapshot
of DP and supporting files") on kernel 4.19 project.

Change-Id: I834620420b8d6a580f1905a2b3250cf4e5b8f293
Signed-off-by: Tatenda Chipeperekwa <tatendac@codeaurora.org>

msm/sde_hdcp_1x.c

@@ -1,6 +1,6 @@
 // SPDX-License-Identifier: GPL-2.0-only
 /*
- * Copyright (c) 2010-2019, The Linux Foundation. All rights reserved.
+ * Copyright (c) 2010-2020, The Linux Foundation. All rights reserved.
  */
 
 #define pr_fmt(fmt)	"[sde-hdcp1x] %s: " fmt, __func__
@@ -14,7 +14,7 @@
 #include <linux/msm_hdcp.h>
 #include <drm/drm_dp_helper.h>
 #include "sde_hdcp.h"
-#include "video/msm_hdmi_hdcp_mgr.h"
+#include "hdcp/msm_hdmi_hdcp_mgr.h"
 #include "dp/dp_reg.h"
 
 #define SDE_HDCP_STATE_NAME (sde_hdcp_state_name(hdcp->hdcp_state))