[PATCH] rtc: Do not return void value.

[Atsushi Nemoto <anemo@mba.ocn.ne.jp>]

This patch fixes these sparse warnings:

drivers/rtc/rtc-ds1742.c:265:2: warning: returning void-valued expression
drivers/rtc/rtc-ds1553.c:409:2: warning: returning void-valued expression

Signed-off-by: Atsushi Nemoto <anemo@mba.ocn.ne.jp>
---
diff --git a/drivers/rtc/rtc-ds1553.c b/drivers/rtc/rtc-ds1553.c
index afa64c7..b9ba29a 100644
--- a/drivers/rtc/rtc-ds1553.c
+++ b/drivers/rtc/rtc-ds1553.c
@@ -406,7 +406,7 @@ static __init int ds1553_init(void)
 
 static __exit void ds1553_exit(void)
 {
-	return platform_driver_unregister(&ds1553_rtc_driver);
+	platform_driver_unregister(&ds1553_rtc_driver);
 }
 
 module_init(ds1553_init);
diff --git a/drivers/rtc/rtc-ds1742.c b/drivers/rtc/rtc-ds1742.c
index d68288b..f578ed1 100644
--- a/drivers/rtc/rtc-ds1742.c
+++ b/drivers/rtc/rtc-ds1742.c
@@ -262,7 +262,7 @@ static __init int ds1742_init(void)
 
 static __exit void ds1742_exit(void)
 {
-	return platform_driver_unregister(&ds1742_rtc_driver);
+	platform_driver_unregister(&ds1742_rtc_driver);
 }
 
 module_init(ds1742_init);
-
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