disp: msm: move from drm_mode to msm_mode

Move away from the private and private_flags fields from drm_mode,
as it is being deprecated in latest kernel version. Instead, Add
msm_display_mode as a wrapper to be used in downstream to store these
parameters. Also, store msm_mode in connector_state to be accessed
in commit path.

Change-Id: Ia5bdebe75f00aa15fb7db4dc3a0d50c30894a95c
Signed-off-by: Orion Brody <obrody@codeaurora.org>

msm/msm_drv.h

@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2016-2020, The Linux Foundation. All rights reserved.
+ * Copyright (c) 2016-2021, The Linux Foundation. All rights reserved.
  * Copyright (C) 2013 Red Hat
  * Author: Rob Clark <robdclark@gmail.com>
  *
@@ -295,6 +295,18 @@ enum panel_op_mode {
 	MSM_DISPLAY_MODE_MAX,
 };
 
+/**
+ * struct msm_display_mode - wrapper for drm_display_mode
+ * @base: drm_display_mode attached to this msm_mode
+ * @private_flags: integer holding private driver mode flags
+ * @private: pointer to private driver information
+ */
+struct msm_display_mode {
+	struct drm_display_mode *base;
+	u32 private_flags;
+	u32 *private;
+};
+
 /**
  * struct msm_ratio - integer ratio
  * @numer: numerator