rtc: rtc-s35390a.c needs the bitreverse library

rtc-s35390a uses BITREVERSE functions so it needs to select that config symbol
to ensure that the functions are built.

  drivers/built-in.o: In function `s35390a_set_datetime':
  linux-2.6.25-rc8-git7/drivers/rtc/rtc-s35390a.c:144: undefined reference to `byte_rev_table'
  drivers/built-in.o: In function `s35390a_get_datetime':
  linux-2.6.25-rc8-git7/drivers/rtc/rtc-s35390a.c:163: undefined reference to `byte_rev_table'
Signed-off-by: NRandy Dunlap <randy.dunlap@oracle.com>
Acked-by: NAlessandro Zummo <a.zummo@towertech.it>
Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>

drivers/rtc/Kconfig

@@ -252,6 +252,7 @@ config RTC_DRV_TWL92330
 
 config RTC_DRV_S35390A
 	tristate "Seiko Instruments S-35390A"
+	select BITREVERSE
 	help
 	  If you say yes here you will get support for the Seiko
 	  Instruments S-35390A.