gpu: nvgpu: bug: move nvgpu_do_assert_print() into assert.c

There was a header file circular dependency that was preventing
including some files. For example, for utils.h to include safe_ops.h
would include bug.h which included log.h which included bitops.h which
included utils.h. To break this loop, the macro nvgpu_do_assert_print()
into a function in a new file assert.c. With this change, log.h is no
longer required in bug.h.

This change also required adding a few includes in C files that were
picking up definitions through the chain above.

JIRA NVGPU-3868

Change-Id: Icf95677bb36e4aa034cba25594cf71f2d028c289
Signed-off-by: Philip Elcan <pelcan@nvidia.com>
Reviewed-on: https://git-master.nvidia.com/r/2168528
Reviewed-by: mobile promotions <svcmobile_promotions@nvidia.com>
Tested-by: mobile promotions <svcmobile_promotions@nvidia.com>

drivers/gpu/nvgpu/os/posix/cond.c

@@ -21,6 +21,7 @@
  */
 
 #include <nvgpu/cond.h>
+#include <nvgpu/safe_ops.h>
 
 int nvgpu_cond_init(struct nvgpu_cond *cond)
 {

drivers/gpu/nvgpu/os/posix/kmem.c

@@ -23,6 +23,7 @@
 #include <stdlib.h>
 
 #include <nvgpu/bug.h>
+#include <nvgpu/log.h>
 #include <nvgpu/kmem.h>
 #include <nvgpu/types.h>
 #include <nvgpu/atomic.h>