disp: msm: sde: add offline WB QoS support

Add support to parse and configure QoS values for offline writeback.
Expose a writeback connector property to allow user-mode to set
the usage type of the writeback block - WFD, CWB, offline-WB.

Change-Id: I864f79c4896ec757ac2d8b0f57a6a5775d164f21
Signed-off-by: Veera Sundaram Sankaran <quic_veeras@quicinc.com>

msm/msm_drv.h

@@ -1,4 +1,5 @@
 /*
+ * Copyright (c) 2021-2022 Qualcomm Innovation Center, Inc. All rights reserved.
  * Copyright (c) 2016-2021, The Linux Foundation. All rights reserved.
  * Copyright (C) 2013 Red Hat
  * Author: Rob Clark <robdclark@gmail.com>
@@ -233,6 +234,7 @@ enum msm_mdp_conn_property {
 	CONNECTOR_PROP_AVR_STEP,
 	CONNECTOR_PROP_CACHE_STATE,
 	CONNECTOR_PROP_DSC_MODE,
+	CONNECTOR_PROP_WB_USAGE_TYPE,
 
 	/* total # of properties */
 	CONNECTOR_PROP_COUNT