drm/vmwgfx: Persistent tracking of context bindings

Only scrub context bindings when a bound resource is destroyed, or when
the MOB backing the context is unbound.

Signed-off-by: Thomas Hellstrom <thellstrom@vmware.com>
Reviewed-by: Zack Rusin <zackr@vmware.com>

diff --cc drivers/gpu/drm/vmwgfx/vmwgfx_context.c
Simple merge

diff --cc drivers/gpu/drm/vmwgfx/vmwgfx_drv.c
Simple merge

diff --cc drivers/gpu/drm/vmwgfx/vmwgfx_drv.h
Simple merge

diff --cc drivers/gpu/drm/vmwgfx/vmwgfx_execbuf.c
Simple merge

diff --cc drivers/gpu/drm/vmwgfx/vmwgfx_resource.c
Simple merge

diff --cc drivers/gpu/drm/vmwgfx/vmwgfx_shader.c
Simple merge

diff --cc drivers/gpu/drm/vmwgfx/vmwgfx_surface.c
Simple merge