drivers/rtc/davinci.c: Reference DAVINCI_RTC_BASE more directly

We shouldn't rely on a define to hide this cast for us.
Signed-off-by: NTom Rini <trini@ti.com>

drivers/rtc/davinci.c

@@ -13,7 +13,7 @@
 #if defined(CONFIG_CMD_DATE)
 int rtc_get(struct rtc_time *tmp)
 {
-	struct davinci_rtc *rtc = davinci_rtc_base;
+	struct davinci_rtc *rtc = (struct davinci_rtc *)DAVINCI_RTC_BASE;
 	unsigned long sec, min, hour, mday, wday, mon_cent, year;
 	unsigned long status;
 
@@ -57,7 +57,7 @@ int rtc_get(struct rtc_time *tmp)
 
 int rtc_set(struct rtc_time *tmp)
 {
-	struct davinci_rtc *rtc = davinci_rtc_base;
+	struct davinci_rtc *rtc = (struct davinci_rtc *)DAVINCI_RTC_BASE;
 
 	debug("Set DATE: %4d-%02d-%02d (wday=%d)  TIME: %2d:%02d:%02d\n",
 		tmp->tm_year, tmp->tm_mon, tmp->tm_mday, tmp->tm_wday,
@@ -75,7 +75,7 @@ int rtc_set(struct rtc_time *tmp)
 
 void rtc_reset(void)
 {
-	struct davinci_rtc *rtc = davinci_rtc_base;
+	struct davinci_rtc *rtc = (struct davinci_rtc *)DAVINCI_RTC_BASE;
 
 	/* run RTC counter */
 	writel(0x01, &rtc->ctrl);