rtc: Clean drivers/rtc/Makefile

Signed-off-by: Michal Simek <monstr@monstr.eu>
diff --git a/drivers/rtc/m48t35ax.c b/drivers/rtc/m48t35ax.c
index be29279..353a30e 100644
--- a/drivers/rtc/m48t35ax.c
+++ b/drivers/rtc/m48t35ax.c
@@ -33,7 +33,7 @@
 #include <rtc.h>
 #include <config.h>
 
-#if defined(CONFIG_RTC_M48T35A) && defined(CONFIG_CMD_DATE)
+#if defined(CONFIG_CMD_DATE)
 
 static uchar rtc_read  (uchar reg);
 static void  rtc_write (uchar reg, uchar val);