etnaviv: fix code style

Fixes: 1194afdf ("etnaviv: rework the stream flush to always go through the context flush")
Signed-off-by: Christian Gmeiner <christian.gmeiner@gmail.com>
Reviewed-by: Jonathan Marek <jonathan@marek.ca>
49 jobs for !2394 with code-style-fixes in 14 minutes and 28 seconds (queued for 3 seconds)
merge request