freedreno/a2xx: fix compressed textures
Two problems: * Multiply has higher priority than shift * rsc->layout.format isn't initialized for a2xx Fixes: 5a8718f0 ("freedreno: Make the slice pitch be bytes, not pixels.") Signed-off-by:Jonathan Marek <jonathan@marek.ca> Part-of: <mesa/mesa!5796> (cherry picked from commit 344e764b)