gpu: nvgpu: unit: add tests for gv11b fifo HAL

Add unit tests for the following HALs:
- gv11b_init_fifo_reset_enable_hw
- gv11b_init_fifo_setup_hw
- gv11b_fifo_mmu_fault_id_to_pbdma_id
- gv11b_fifo_intr_0_enable
- gv11b_fifo_handle_sched_error
- gv11b_fifo_intr_0_isr
- gv11b_fifo_intr_set_recover_mask
- gv11b_fifo_intr_unset_recover_mask

Jira NVGPU-4386

Change-Id: I888aca62e8eb8223a1def693a5ed51500baa37fc
Signed-off-by: Thomas Fleury <tfleury@nvidia.com>
Reviewed-on: https://git-master.nvidia.com/r/2256265
Reviewed-by: mobile promotions <svcmobile_promotions@nvidia.com>
Tested-by: mobile promotions <svcmobile_promotions@nvidia.com>

userspace/SWUTS.h

@@ -47,6 +47,7 @@
  *   - @ref SWUTS-fifo-engine-gv100
  *   - @ref SWUTS-fifo-engine-gv11b
  *   - @ref SWUTS-fifo-fifo-gk20a
+ *   - @ref SWUTS-fifo-fifo-gv11b
  *   - @ref SWUTS-fifo-pbdma
  *   - @ref SWUTS-fifo-pbdma-gm20b
  *   - @ref SWUTS-fifo-pbdma-gp10b