i2c: gpio: remove error checks with debugfs

debugfs can handle error pointers in subsequent calls. So, remove the
error checks as suggested by kerneldoc of this function.
Reported-by: Minjie Du <duminjie@vivo.com>
Closes: http://patchwork.ozlabs.org/project/linux-i2c/patch/20230713101829.15548-1-duminjie@vivo.com/Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Reviewed-by: Andi Shyti <andi.shyti@kernel.org>
Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be>
Signed-off-by: Wolfram Sang <wsa@kernel.org>

drivers/i2c/busses/i2c-gpio.c

@@ -263,15 +263,10 @@ static void i2c_gpio_fault_injector_init(struct platform_device *pdev)
 	 * 'fault-injector' dir there. Until then, we have a global dir with
 	 * all adapters as subdirs.
 	 */
-	if (!i2c_gpio_debug_dir) {
+	if (!i2c_gpio_debug_dir)
 		i2c_gpio_debug_dir = debugfs_create_dir("i2c-fault-injector", NULL);
-		if (!i2c_gpio_debug_dir)
-			return;
-	}
 
 	priv->debug_dir = debugfs_create_dir(pdev->name, i2c_gpio_debug_dir);
-	if (!priv->debug_dir)
-		return;
 
 	init_completion(&priv->scl_irq_completion);