xf86-video-amdgpu: Changes to 'push-87'

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New branch 'push-87' available with the following commits:
commit fd94b2c1d2ff5cbd8823f9053a46b3bd346d2831
Author: Hamza Mahfooz <hamza.mahfooz at amd.com>
Date:   Thu Sep 7 08:15:14 2023 -0400

    Enable TearFree if it's set to auto and VariableRefresh is enabled
    
    As of kernel commit 1ca67aba8d11 ("drm/amd/display: only accept async
    flips for fast updates"), we reject async flips that used to be silently
    degraded to vsync. However, this causes issues for VRR if TearFree isn't
    enabled, in particular we have seen that VRR fails to engage on a
    handful of tested applications and in one case we even observed an
    application soft hang. So, if TearFree is set to auto we should enable
    it if VariableRefresh is enabled and we should warn users if they try to
    enable VariableRefresh while TearFree is disabled.
    
    Signed-off-by: Hamza Mahfooz <hamza.mahfooz at amd.com>