rtc: make rtc-ds1742 driver hotplug-aware

The rtc-ds1742 platform driver name doesn't match its module name,
which might prevents it from properly hotplugging.  There is only two
in-tree user of its driver, which are fixed by this patch too.

Signed-off-by: Atsushi Nemoto <anemo@mba.ocn.ne.jp>
Cc: Alessandro Zummo <a.zummo@towertech.it>
Cc: David Brownell <david-b@pacbell.net>
Cc: Ralf Baechle <ralf@linux-mips.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
diff --git a/drivers/rtc/rtc-ds1742.c b/drivers/rtc/rtc-ds1742.c
index 67291b0..c535b78 100644
--- a/drivers/rtc/rtc-ds1742.c
+++ b/drivers/rtc/rtc-ds1742.c
@@ -251,7 +251,7 @@
 	.probe		= ds1742_rtc_probe,
 	.remove		= __devexit_p(ds1742_rtc_remove),
 	.driver		= {
-		.name	= "ds1742",
+		.name	= "rtc-ds1742",
 		.owner	= THIS_MODULE,
 	},
 };