davinci: Add RTC support for DA8xx/OMAP-L13x SoC's

Add RTC support for the da830/omap-l137 and da850/omap-l138
SoC's by leveraging existing the rtc-omap driver.

Signed-off-by: Mark A. Greer <mgreer@mvista.com>
Signed-off-by: Kevin Hilman <khilman@deeprootsystems.com>
diff --git a/arch/arm/mach-davinci/board-da850-evm.c b/arch/arm/mach-davinci/board-da850-evm.c
index da1a6fb..47619a9 100644
--- a/arch/arm/mach-davinci/board-da850-evm.c
+++ b/arch/arm/mach-davinci/board-da850-evm.c
@@ -381,6 +381,10 @@
 	if (ret)
 		pr_warning("da850_evm_init: lcdc registration failed: %d\n",
 				ret);
+
+	ret = da8xx_register_rtc();
+	if (ret)
+		pr_warning("da850_evm_init: rtc setup failed: %d\n", ret);
 }
 
 #ifdef CONFIG_SERIAL_8250_CONSOLE