drm/amd/display: Cursor Info Update refactor

Dc: cursor info update: phase 1:

[Why]

Different feature might need to update cursor info, but
With different approaches.
To unify this diversity problem, all features should use
The same interface to update cursor.

Reviewed-by: Reza Amini <reza.amini@amd.com>
Acked-by: Jasdeep Dhillon <jdhillon@amd.com>
Signed-off-by: Max Tseng <max.tseng@amd.com>
Tested-by: Daniel Wheeler <daniel.wheeler@amd.com>

drivers/gpu/drm/amd/display/dc/core/dc_stream.c

@@ -30,6 +30,7 @@
 #include "resource.h"
 #include "ipp.h"
 #include "timing_generator.h"
+#include "dc_dmub_srv.h"
 
 #define DC_LOGGER dc->ctx->logger
 

drivers/gpu/drm/amd/display/dmub/inc/dmub_cmd.h

@@ -760,6 +760,11 @@ enum dmub_cmd_dpia_type {
 	DMUB_CMD__DPIA_MST_ALLOC_SLOTS = 2,
 };
 
+enum dmub_cmd_header_sub_type {
+	DMUB_CMD__SUB_TYPE_GENERAL         = 0,
+	DMUB_CMD__SUB_TYPE_CURSOR_POSITION = 1
+};
+
 #pragma pack(push, 1)
 
 /**