drm/amd/display: Add Function declaration in dc_link

[WHY]
Housekeeping cleaning and adding declaration for
function to be called from DM layer

[HOW]
Adding public functions to dc_link.h
Reviewed-by: Jun Lei <Jun.Lei@amd.com>
Acked-by: Alex Hung <alex.hung@amd.com>
Signed-off-by: Mustapha Ghaddar <mghaddar@amd.com>
Tested-by: Daniel Wheeler <daniel.wheeler@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

drivers/gpu/drm/amd/display/dc/dc_link.h

@@ -627,4 +627,31 @@ struct fixed31_32 calculate_sst_avg_time_slots_per_mtp(
 void setup_dp_hpo_stream(struct pipe_ctx *pipe_ctx, bool enable);
 void dp_source_sequence_trace(struct dc_link *link, uint8_t dp_test_mode);
 
+/*
+ *  USB4 DPIA BW ALLOCATION PUBLIC FUNCTIONS
+ */
+/*
+ * Send a request from DP-Tx requesting to allocate BW remotely after
+ * allocating it locally. This will get processed by CM and a CB function
+ * will be called.
+ *
+ * @link: pointer to the dc_link struct instance
+ * @req_bw: The requested bw in Kbyte to allocated
+ *
+ * return: none
+ */
+void dc_link_set_usb4_req_bw_req(struct dc_link *link, int req_bw);
+
+/*
+ * CB function for when the status of the Req above is complete. We will
+ * find out the result of allocating on CM and update structs accordingly
+ *
+ * @link: pointer to the dc_link struct instance
+ * @bw: Allocated or Estimated BW depending on the result
+ * @result: Response type
+ *
+ * return: none
+ */
+void dc_link_get_usb4_req_bw_resp(struct dc_link *link, uint8_t bw, uint8_t result);
+
 #endif /* DC_LINK_H_ */

drivers/gpu/drm/amd/display/dc/link/protocols/link_dp_dpia_bw.h

@@ -44,30 +44,6 @@ enum bw_type {
  */
 bool set_dptx_usb4_bw_alloc_support(struct dc_link *link);
 
-/*
- * Send a request from DP-Tx requesting to allocate BW remotely after
- * allocating it locally. This will get processed by CM and a CB function
- * will be called.
- *
- * @link: pointer to the dc_link struct instance
- * @req_bw: The requested bw in Kbyte to allocated
- *
- * return: none
- */
-void set_usb4_req_bw_req(struct dc_link *link, int req_bw);
-
-/*
- * CB function for when the status of the Req above is complete. We will
- * find out the result of allocating on CM and update structs accordingly
- *
- * @link: pointer to the dc_link struct instance
- * @bw: Allocated or Estimated BW depending on the result
- * @result: Response type
- *
- * return: none
- */
-void get_usb4_req_bw_resp(struct dc_link *link, uint8_t bw, uint8_t result);
-
 /*
  * Return the response_ready flag from dc_link struct
  *