ASoC: rt5645: fix coccinelle warnings

Return statements in functions returning bool should use
true/false instead of 1/0.

Signed-off-by: Oder Chiou <oder_chiou@realtek.com>
Signed-off-by: Mark Brown <broonie@linaro.org>

sound/soc/codecs/rt5645.c

@@ -242,9 +242,9 @@ static bool rt5645_volatile_register(struct device *dev, unsigned int reg)
 	case RT5645_VENDOR_ID:
 	case RT5645_VENDOR_ID1:
 	case RT5645_VENDOR_ID2:
-		return 1;
+		return true;
 	default:
-		return 0;
+		return false;
 	}
 }
 
@@ -391,9 +391,9 @@ static bool rt5645_readable_register(struct device *dev, unsigned int reg)
 	case RT5645_VENDOR_ID:
 	case RT5645_VENDOR_ID1:
 	case RT5645_VENDOR_ID2:
-		return 1;
+		return true;
 	default:
-		return 0;
+		return false;
 	}
 }