[PATCH AUTOSEL 5.0 070/262] drm/amd/display: Pass app_tf by value rather than by reference

[Pavel Machek]

> From: Nathan Chancellor <natechancellor at gmail.com>
> 
> [ Upstream commit 672e78cab819ebe31e3b9b8abac367be8a110472 ]
> 
> Clang warns when an expression that equals zero is used as a null
> pointer constant (in lieu of NULL):

Fixes warning, with unsupported compiler; not a serious bug. Plus, not
a minimal fix.
								Pavel

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