freedreno: remove assert that viewport miny,maxy >= 0
Viewport is allowed to be outside of bounds.
Fixes piglit tests:
fbo-viewport
viewport-clamp
Due to an influx of spam, we have had to impose restrictions on new accounts. Please see this wiki page for instructions on how to get full permissions. Sorry for the inconvenience.
Viewport is allowed to be outside of bounds.
Fixes piglit tests:
fbo-viewport
viewport-clamp