staging: Fixes some checkpatch warnings in asus_oled/asus_oled.c

This fixes the following warnings:

	1: Changes a printk(KERN_ERR) call to a pr_err call in line 785
	2: Changes a printk(KERN_ERR) call to a pr_err call in line 791
	3: Changes a printk(KERN_ERR) call to a pr_err call in line 798
	4: Reduces line length below 80 at line 785 (Not intended)
	5: Reduces line length below 80 at line 798 (Not intended)
Signed-off-by: Cruz Julian Bishop <cruz@massive-dynamics.biz>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/asus_oled/asus_oled.c

@@ -782,20 +782,20 @@ static int __init asus_oled_init(void)
 	oled_class = class_create(THIS_MODULE, ASUS_OLED_UNDERSCORE_NAME);
 
 	if (IS_ERR(oled_class)) {
-		printk(KERN_ERR "Error creating " ASUS_OLED_UNDERSCORE_NAME " class\n");
+		pr_err("Error creating " ASUS_OLED_UNDERSCORE_NAME " class\n");
 		return PTR_ERR(oled_class);
 	}
 
 	retval = class_create_file(oled_class, &class_attr_version.attr);
 	if (retval) {
-		printk(KERN_ERR "Error creating class version file\n");
+		pr_err("Error creating class version file\n");
 		goto error;
 	}
 
 	retval = usb_register(&oled_driver);
 
 	if (retval) {
-		printk(KERN_ERR "usb_register failed. Error number %d\n", retval);
+		pr_err("usb_register failed. Error number %d\n", retval);
 		goto error;
 	}