regulator: aat2870: Fix the logic of checking if no id is matched in aat2870_get_regulator

commit d4d6373c upstream.

In current implementation, the pointer ri is not NULL if no id is matched.
Fix it by checking i == ARRAY_SIZE(aat2870_regulators) if no id is matched.
Signed-off-by: Axel Lin <axel.lin@gmail.com>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

drivers/regulator/aat2870-regulator.c

@@ -159,7 +159,7 @@ static struct aat2870_regulator *aat2870_get_regulator(int id)
 			break;
 	}
 
-	if (!ri)
+	if (i == ARRAY_SIZE(aat2870_regulators))
 		return NULL;
 
 	ri->enable_addr = AAT2870_LDO_EN;