rtc: sysfs: make name uniform

The name sysfs attribute is not useful in its current form because of all
the drivers:
 - 3 are using the feature correctly
 - 2 are clearly misusing it
 - 60 are using driver.name, either directly or indirectly
 - 46 are using pdev->name
 - 8 are using client->name
 - 31 are using a variation of driver.name (addition or removal of rtc-,
   -rtc, _rtc, rtc_)

Make it uniform and use the driver name and the device name.
Signed-off-by: Alexandre Belloni <alexandre.belloni@free-electrons.com>

drivers/rtc/rtc-sysfs.c

@@ -27,7 +27,8 @@
 static ssize_t
 name_show(struct device *dev, struct device_attribute *attr, char *buf)
 {
-	return sprintf(buf, "%s\n", to_rtc_device(dev)->name);
+	return sprintf(buf, "%s %s\n", dev_driver_string(dev->parent),
+		       dev_name(dev->parent));
 }
 static DEVICE_ATTR_RO(name);