rewrite/cleanup Blackfin RTC driver

Signed-off-by: Mike Frysinger <vapier@gentoo.org>
diff --git a/drivers/rtc/Makefile b/drivers/rtc/Makefile
index 8c7f148..2af2bf4 100644
--- a/drivers/rtc/Makefile
+++ b/drivers/rtc/Makefile
@@ -28,7 +28,7 @@
 LIB	= $(obj)librtc.a
 
 COBJS-y += date.o
-COBJS-y += bf5xx_rtc.o
+COBJS-y += bfin_rtc.o
 COBJS-y += ds12887.o
 COBJS-y += ds1302.o
 COBJS-y += ds1306.o