nvgpu: gk20a: Fix Sparse warning

Fixed the following warning:
- gk20a.c:147:5: warning: symbol
  'gk20a_railgating_debugfs_init'
  was not declared ?

Bug 200067946
Bug 200088648

Change-Id: Ic7b1a24cee5066249e7d25db87a3e1569a608e6c
Signed-off-by: Minal Ugale <mugale@nvidia.com>
Reviewed-on: http://git-master/r/1183272
Reviewed-by: Automatic_Commit_Validation_User
Reviewed-by: Sachin Nikam <snikam@nvidia.com>

1 files changed, 1 insertions, 1 deletions

diff --git a/drivers/gpu/nvgpu/gk20a/gk20a.c b/drivers/gpu/nvgpu/gk20a/gk20a.c
index 822cd3ff..50f67262 100644
--- a/drivers/gpu/nvgpu/gk20a/gk20a.c
+++ b/drivers/gpu/nvgpu/gk20a/gk20a.c
@@ -144,7 +144,7 @@ static const struct file_operations railgate_residency_fops = {
         .release        = single_release,
 };
 
-int gk20a_railgating_debugfs_init(struct device *dev)
+static int gk20a_railgating_debugfs_init(struct device *dev)
 {
         struct dentry *d;
         struct gk20a_platform *platform = dev_get_drvdata(dev);