freedreno: Move the resource_read early out to an inline.

Looking at perf, the drawoverhead test case was now spending 13% CPU (89%
in that function) on stack management.

nohw drawoverhead throughput 1.03902% +/- 0.380257% (n=13).

Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/4996>
3 files changed