media: staging: atomisp: Removed else branch in function

This patch fixes the checkpatch.pl warning :

WARNING: else is not generally useful after a break or return

Expressions under 'else' branch in function 'gc0310_s_power' are
executed whenever the exppression in 'if' is False. Otherwise, return
from function occurs. Therefore, there is no need in 'else', and it has
been removed.

Link: https://lore.kernel.org/linux-media/20201006081721.GA35979@linuxSigned-off-by: Leonid Kushnir <leonf008@gmail.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>

drivers/staging/media/atomisp/i2c/atomisp-gc0310.c

@@ -874,11 +874,10 @@ static int gc0310_s_power(struct v4l2_subdev *sd, int on)
 
 	if (on == 0)
 		return power_down(sd);
-	else {
-		ret = power_up(sd);
-		if (!ret)
-			return gc0310_init(sd);
-	}
+	ret = power_up(sd);
+	if (!ret)
+		return gc0310_init(sd);
+
 	return ret;
 }