nv50,nvc0: remove explicit target argument from view creation

nv50,nvc0: remove explicit target argument from view creation

Before texture views were supported, this was needed in some cases.
However with texture views (added eons ago), there is now a target
attribute in the template. Use it and remove the explicit argument.

Should help prevent bugs with inconsistencies between the stored
template target and the one that's used to create the view.

Signed-off-by: Ilia Mirkin <imirkin@alum.mit.edu>
Reviewed-by: Karol Herbst <kherbst@redhat.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/9740>