drivers/rtc/rtc-tps6586x.c: remove incorrect use of rtc_device_unregister

Device managed functions do not need explicit freeing/unregistering.
Moreover in this case it was done using non-device managed function
which is incorrect.  Hence remove it.
Signed-off-by: Sachin Kamat <sachin.kamat@linaro.org>
Cc: Laxman dewangan <ldewangan@nvidia.com>
Cc: Chiwoong Byun <woong.byun@samsung.com>
Cc: Jonghwa Lee <jonghwa3.lee@samsung.com>
Cc: Venu Byravarasu <vbyravarasu@nvidia.com>
Cc: Jingoo Han <jg1.han@samsung.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

drivers/rtc/rtc-tps6586x.c

@@ -289,15 +289,12 @@ static int tps6586x_rtc_probe(struct platform_device *pdev)
 	if (ret < 0) {
 		dev_err(&pdev->dev, "request IRQ(%d) failed with ret %d\n",
 				rtc->irq, ret);
-		goto fail_req_irq;
+		goto fail_rtc_register;
 	}
 	disable_irq(rtc->irq);
 	device_set_wakeup_capable(&pdev->dev, 1);
 	return 0;
 
-fail_req_irq:
-	rtc_device_unregister(rtc->rtc);
-
 fail_rtc_register:
 	tps6586x_update(tps_dev, RTC_CTRL, 0,
 		RTC_ENABLE | OSC_SRC_SEL | PRE_BYPASS | CL_SEL_MASK);