gpu: nvgpu: rename <nvgpu/top.h> to <nvgpu/device.h>

top.h is a description of "devices" available on the GPU. As such
rename this header to device.h.

device.h will ultimately be a unit of actual C code that will rely
on the top HAL to fill a device list.

JIRA NVGPU-5421

Change-Id: If6e4a537d2209e429a678761a34713723da7a00a
Signed-off-by: Alex Waterman <alexw@nvidia.com>
Reviewed-on: https://git-master.nvidia.com/r/c/linux-nvgpu/+/2319648
Reviewed-by: automaticguardword <automaticguardword@nvidia.com>
Reviewed-by: Konsta Holtta <kholtta@nvidia.com>
Reviewed-by: mobile promotions <svcmobile_promotions@nvidia.com>
Tested-by: mobile promotions <svcmobile_promotions@nvidia.com>

userspace/units/fifo/engine/gm20b/nvgpu-engine-gm20b.c

@@ -29,7 +29,7 @@
 
 #include <nvgpu/gk20a.h>
 #include <nvgpu/io.h>
-#include <nvgpu/top.h>
+#include <nvgpu/device.h>
 #include <nvgpu/engines.h>
 #include <nvgpu/engine_status.h>
 

userspace/units/fifo/engine/gp10b/nvgpu-engine-gp10b.c

@@ -29,7 +29,7 @@
 
 #include <nvgpu/gk20a.h>
 #include <nvgpu/io.h>
-#include <nvgpu/top.h>
+#include <nvgpu/device.h>
 #include <nvgpu/engines.h>
 #include <nvgpu/engine_status.h>
 

userspace/units/mc/nvgpu-mc.c

@@ -27,7 +27,7 @@
 #include <nvgpu/gk20a.h>
 #include <nvgpu/mc.h>
 #include <nvgpu/hal_init.h>
-#include <nvgpu/top.h>
+#include <nvgpu/device.h>
 #include <nvgpu/engines.h>
 #include <nvgpu/ltc.h>
 #include <nvgpu/hw/gp10b/hw_mc_gp10b.h>

userspace/units/top/nvgpu-top.c

@@ -25,7 +25,7 @@
 #include <nvgpu/posix/io.h>
 
 #include <nvgpu/gk20a.h>
-#include <nvgpu/top.h>
+#include <nvgpu/device.h>
 #include <hal/top/top_gm20b.h>
 #include <hal/top/top_gp10b.h>
 #include <hal/top/top_gv11b.h>