rtc: Clean drivers/rtc/Makefile

Signed-off-by: Michal Simek <monstr@monstr.eu>
diff --git a/drivers/rtc/ds1307.c b/drivers/rtc/ds1307.c
index b20f193..11fc14f 100644
--- a/drivers/rtc/ds1307.c
+++ b/drivers/rtc/ds1307.c
@@ -35,8 +35,7 @@
 #include <rtc.h>
 #include <i2c.h>
 
-#if (defined(CONFIG_RTC_DS1307) || defined(CONFIG_RTC_DS1338) ) && \
-    defined(CONFIG_CMD_DATE)
+#if defined(CONFIG_CMD_DATE)
 
 /*---------------------------------------------------------------------*/
 #undef DEBUG_RTC