rtc: Clean drivers/rtc/Makefile

Signed-off-by: Michal Simek <monstr@monstr.eu>
diff --git a/drivers/rtc/m41t11.c b/drivers/rtc/m41t11.c
index fce00d9..3727310 100644
--- a/drivers/rtc/m41t11.c
+++ b/drivers/rtc/m41t11.c
@@ -43,7 +43,7 @@
 #endif
 */
 
-#if defined(CONFIG_RTC_M41T11) && defined(CFG_I2C_RTC_ADDR) && defined(CONFIG_CMD_DATE)
+#if defined(CFG_I2C_RTC_ADDR) && defined(CONFIG_CMD_DATE)
 
 static unsigned bcd2bin (uchar n)
 {