thermal: tegra: no need to check return value of debugfs_create functions

When calling debugfs functions, there is no need to ever check the
return value.  The function can work or not, but the code logic should
never do something different based on this.

Cc: Zhang Rui <rui.zhang@intel.com>
Cc: Eduardo Valentin <edubezval@gmail.com>
Cc: Daniel Lezcano <daniel.lezcano@linaro.org>
Cc: Thierry Reding <thierry.reding@gmail.com>
Cc: Jonathan Hunter <jonathanh@nvidia.com>
Cc: Wei Ni <wni@nvidia.com>
Cc: Yangtao Li <tiny.windzz@gmail.com>
Cc: linux-pm@vger.kernel.org
Acked-by: Thierry Reding <treding@nvidia.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/thermal/tegra/soctherm.c

@@ -1485,23 +1485,13 @@ DEFINE_SHOW_ATTRIBUTE(regs);
 static void soctherm_debug_init(struct platform_device *pdev)
 {
 	struct tegra_soctherm *tegra = platform_get_drvdata(pdev);
-	struct dentry *root, *file;
+	struct dentry *root;
 
 	root = debugfs_create_dir("soctherm", NULL);
-	if (!root) {
-		dev_err(&pdev->dev, "failed to create debugfs directory\n");
-		return;
-	}
 
 	tegra->debugfs_dir = root;
 
-	file = debugfs_create_file("reg_contents", 0644, root,
-				   pdev, &regs_fops);
-	if (!file) {
-		dev_err(&pdev->dev, "failed to create debugfs file\n");
-		debugfs_remove_recursive(tegra->debugfs_dir);
-		tegra->debugfs_dir = NULL;
-	}
+	debugfs_create_file("reg_contents", 0644, root, pdev, &regs_fops);
 }
 #else
 static inline void soctherm_debug_init(struct platform_device *pdev) {}