drm/amdgpu/display: Use u64 divide macro for round up division

[why]
Fix compilation warnings on i386 architecture:
undefined reference to `__udivdi3'
[how]
Switch DIV_ROUND_UP to DIV64_U64_ROUND_UP
Reported-by: Randy Dunlap <rdunlap@infradead.org>
Reviewed-by: Harry Wentland <harry.wentland@amd.com>
Signed-off-by: Mikita Lipski <mikita.lipski@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

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

@@ -534,7 +534,7 @@ static int kbps_to_peak_pbn(int kbps)
 
 	peak_kbps *= 1006;
 	peak_kbps = div_u64(peak_kbps, 1000);
-	return (int) DIV_ROUND_UP(peak_kbps * 64, (54 * 8 * 1000));
+	return (int) DIV64_U64_ROUND_UP(peak_kbps * 64, (54 * 8 * 1000));
 }
 
 static void set_dsc_configs_from_fairness_vars(struct dsc_mst_fairness_params *params,