ARM: davinci: da8xx: remove hard coding of rtc device wakeup

Since now rtc-omap driver itself calls deice_init_wakeup(dev, true),
duplicate call from the rtc device registration can be removed.

This is basically a partial revert of the prev commit

commit 75c99bb0
Author: Sekhar Nori <nsekhar@ti.com>

    davinci: da8xx/omap-l1: mark RTC as a wakeup source
Signed-off-by: Hebbar Gururaja <gururaja.hebbar@ti.com>
Acked-by: Kevin Hilman <khilman@linaro.org>
Acked-by: Sekhar Nori <nsekhar@ti.com>
Cc: Russell King <linux@arm.linux.org.uk>
Signed-off-by: Sekhar Nori <nsekhar@ti.com>

arch/arm/mach-davinci/devices-da8xx.c

@@ -856,14 +856,7 @@ static struct platform_device da8xx_rtc_device = {
 
 int da8xx_register_rtc(void)
 {
-	int ret;
-
-	ret = platform_device_register(&da8xx_rtc_device);
-	if (!ret)
-		/* Atleast on DA850, RTC is a wakeup source */
-		device_init_wakeup(&da8xx_rtc_device.dev, true);
-
-	return ret;
+	return platform_device_register(&da8xx_rtc_device);
 }
 
 static void __iomem *da8xx_ddr2_ctlr_base;