[why]
The existing limit was mistakenly bigger than 4k for DCN 3.1
Reviewed-by: Zhan Liu <Zhan.Liu@amd.com>
Acked-by: Solomon Chiu <solomon.chiu@amd.com>
Signed-off-by: Nikola Cornij <nikola.cornij@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
        .disable_dcc = DCC_ENABLE,
        .vsr_support = true,
        .performance_trace = false,
-       .max_downscale_src_width = 7680,/*upto 8K*/
+       .max_downscale_src_width = 3840,/*upto 4K*/
        .disable_pplib_wm_range = false,
        .scl_reset_length10 = true,
        .sanity_checks = false,