ASoC: rt5640: correct 5640's device ID

This patch correct rt5640's device ID

Signed-off-by: Bard Liao <bardliao@realtek.com>
Tested-by: Stephen Warren <swarren@nvidia.com>
Signed-off-by: Mark Brown <broonie@linaro.org>

sound/soc/codecs/rt5640.h

@@ -195,7 +195,7 @@
 /* SW Reset & Device ID (0x00) */
 #define RT5640_ID_MASK				(0x3 << 1)
 #define RT5640_ID_5639				(0x0 << 1)
-#define RT5640_ID_5640				(0x1 << 1)
+#define RT5640_ID_5640				(0x2 << 1)
 #define RT5640_ID_5642				(0x3 << 1)