nvc0: Remove unnecessary bsp_bo NULL check.
Fix defect reported by Coverity Scan.
Dereference before null check (REVERSE_INULL) check_after_deref: Null-checking bsp_bo suggests that it may be null, but it has already been dereferenced on all paths leading to the check.
Signed-off-by: Vinson Lee vlee@freedesktop.org