power: supply: cros_charge-control: allow start_threshold == end_threshold

Allow setting the start and stop thresholds to the same value.
There is no reason to disallow it.

Suggested-by: Thomas Koch <[e-mail]>
Fixes: c6ed48ef5259 ("power: supply: add ChromeOS EC based charge control driver")
Cc: [e-mail]
Signed-off-by: Thomas Weißschuh <[e-mail]>
Link: https://lore.kernel.org/r/[e-mail]
Signed-off-by: Sebastian Reichel <[e-mail]>

drivers/power/supply/cros_charge-control.c

···
 		return -EINVAL;
 
 	if (is_end_threshold) {
-		if (val <= priv->current_start_threshold)
+		if (val < priv->current_start_threshold)
 			return -EINVAL;
 		priv->current_end_threshold = val;
 	} else {
-		if (val >= priv->current_end_threshold)
+		if (val > priv->current_end_threshold)
 			return -EINVAL;
 		priv->current_start_threshold = val;
 	}