rtc: Clean drivers/rtc/Makefile

Signed-off-by: Michal Simek <monstr@monstr.eu>
diff --git a/drivers/rtc/rs5c372.c b/drivers/rtc/rs5c372.c
index 1c9b752..38db199 100644
--- a/drivers/rtc/rs5c372.c
+++ b/drivers/rtc/rs5c372.c
@@ -34,7 +34,7 @@
 #include <rtc.h>
 #include <i2c.h>
 
-#if defined(CONFIG_RTC_RS5C372A) && defined(CONFIG_CMD_DATE)
+#if defined(CONFIG_CMD_DATE)
 /*
  * Reads are always done starting with register 15, which requires some
  * jumping-through-hoops to access the data correctly.