drm/amdgpu/dm/mst: Rename get_payload_table()

This function isn't too confusing if you see the comment around the
call-site for it, but if you don't then it's not at all obvious this is
meant to copy DRM's payload table over to DC's internal state structs.
Seeing this function before finding that comment definitely threw me into a
loop a few times.

So, let's rename this to make it's purpose more obvious regardless of where
in the code you are.
Signed-off-by: Lyude Paul <lyude@redhat.com>
Cc: Wayne Lin <Wayne.Lin@amd.com>
Cc: Fangzhi Zuo <Jerry.Zuo@amd.com>
Acked-by: Jani Nikula <jani.nikula@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20220817193847.557945-3-lyude@redhat.com

drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_helpers.c

@@ -153,8 +153,9 @@ enum dc_edid_status dm_helpers_parse_edid_caps(
 	return result;
 }
 
-static void get_payload_table(struct amdgpu_dm_connector *aconnector,
-			      struct dc_dp_mst_stream_allocation_table *proposed_table)
+static void
+fill_dc_mst_payload_table_from_drm(struct amdgpu_dm_connector *aconnector,
+				   struct dc_dp_mst_stream_allocation_table *proposed_table)
 {
 	int i;
 	struct drm_dp_mst_topology_mgr *mst_mgr =
@@ -252,7 +253,7 @@ bool dm_helpers_dp_mst_write_payload_allocation_table(
 	 * stream. AMD ASIC stream slot allocation should follow the same
 	 * sequence. copy DRM MST allocation to dc */
 
-	get_payload_table(aconnector, proposed_table);
+	fill_dc_mst_payload_table_from_drm(aconnector, proposed_table);
 
 	return true;
 }