gpu: nvgpu: move mc gpu_ops out of gk20a.h and add doxygen comments for HALs

gk20a.h will include gops_mc.h to contain the mc ops definitions. Add
doxygen comments for the HAL functions that are called directly.
Also move mc_gp10b_intr_pmu_unit_config to non-fusa HAL file.

JIRA NVGPU-2524

Change-Id: I4f326332d7842211b004b372d79fac9fe6ed40e7
Signed-off-by: Sagar Kamble <skamble@nvidia.com>
Reviewed-on: https://git-master.nvidia.com/r/2226017
Reviewed-by: mobile promotions <svcmobile_promotions@nvidia.com>
Tested-by: mobile promotions <svcmobile_promotions@nvidia.com>

userspace/units/init/nvgpu-init.c

@@ -31,6 +31,7 @@
 #include <nvgpu/hw/gm20b/hw_mc_gm20b.h>
 #include <nvgpu/posix/posix-fault-injection.h>
 #include <nvgpu/dma.h>
+#include <nvgpu/gops_mc.h>
 
 #include "nvgpu-init.h"
 

userspace/units/mm/mm/mm.c

@@ -27,6 +27,8 @@
 
 #include <nvgpu/nvgpu_init.h>
 #include <nvgpu/posix/io.h>
+#include <nvgpu/gops_mc.h>
+
 #include "os/posix/os_posix.h"
 
 #include "hal/mm/mm_gp10b.h"

userspace/units/mm/page_table_faults/page_table_faults.c

@@ -34,6 +34,8 @@
 #include <nvgpu/vm.h>
 #include <nvgpu/nvgpu_sgt.h>
 #include <nvgpu/fifo.h>
+#include <nvgpu/gops_mc.h>
+
 #include "os/posix/os_posix.h"
 #include "hal/fifo/channel_gv11b.h"