drm/amdgpu/soc21: update VCN 4 max HEVC encoding resolution

drm/amdgpu/soc21: update VCN 4 max HEVC encoding resolution

commit 2f542421a47e8246e9b7d2c6508fe3a6e6c63078 upstream.

Update the maximum resolution reported for HEVC encoding on VCN 4
devices to reflect its 8K encoding capability.

Closes: https://gitlab.freedesktop.org/drm/amd/-/issues/3159
Signed-off-by: Thong <thong.thai@amd.com>
Reviewed-by: Ruijing Dong <ruijing.dong@amd.com>
Acked-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Cc: stable@vger.kernel.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>