drm/amd/display: Update LTTPR UHBR link rate support struct

[WHY]
Update field order to match DP2.0 spec SCR
Reviewed-by: George Shen <George.Shen@amd.com>
Acked-by: Alex Hung <alex.hung@amd.com>
Signed-off-by: Michael Strauss <michael.strauss@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_dp_types.h

@@ -993,8 +993,8 @@ union dp_128b_132b_supported_link_rates {
 union dp_128b_132b_supported_lttpr_link_rates {
 	struct {
 		uint8_t UHBR10	:1;
-		uint8_t UHBR13_5:1;
 		uint8_t UHBR20	:1;
+		uint8_t UHBR13_5:1;
 		uint8_t RESERVED:5;
 	} bits;
 	uint8_t raw;