drm/amd/display: delete the redundant initialization in dcn3_51_soc

the dram_clock_change_latency_us in dcn3_51_soc is initialized twice, so
delete one of them.
Acked-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Xiang Yang <xiangyang3@huawei.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

drivers/gpu/drm/amd/display/dc/dml/dcn351/dcn351_fpu.c

@@ -237,7 +237,6 @@ struct _vcs_dpi_soc_bounding_box_st dcn3_51_soc = {
 	.urgent_latency_adjustment_fabric_clock_component_us = 0,
 	.urgent_latency_adjustment_fabric_clock_reference_mhz = 0,
 	.num_chans = 4,
-	.dram_clock_change_latency_us = 11.72,
 	.dispclk_dppclk_vco_speed_mhz = 2400.0,
 };