nvc0: re-upload currently bound shaders after code eviction

nvc0: re-upload currently bound shaders after code eviction

This fixes a very old issue which happens when the code segment
size is full. A bunch of real applications like Tomb Raider,
F1 2015, Elemental, hit that issue because they use a ton of shaders.

In this case, all shaders are evicted (for freeing space) but all
currently bound shaders also need to be re-uploaded and SP_START_ID
have to be updated accordingly.

Signed-off-by: Samuel Pitoiset <samuel.pitoiset@gmail.com>
Reviewed-by: Ilia Mirkin <imirkin@alum.mit.edu>