freedreno: Fix the type of single-component scaled vertex attrs.

freedreno: Fix the type of single-component scaled vertex attrs.

This looks like clear copy-and-pasteos, and fixes:

dEQP-GLES2.functional.draw.random.40

(on A307 and A630, both tested in the new CI farm)

Reviewed-by: Rob Clark <robdclark@chromium.org>