ASoC: Fix off-by-one bug in WM8962 register cache size configuration

This is a simple off-by-one bug, the size of the register cache is
incorrectly set to the maximum register index. Fix it by adding one.
Signed-off-by: Dimitris Papastamos <dp@opensource.wolfsonmicro.com>
Acked-by: Liam Girdwood <lrg@slimlogic.co.uk>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>

sound/soc/codecs/wm8962.c

@@ -1780,7 +1780,7 @@ static struct snd_soc_codec_driver soc_codec_dev_wm8962 = {
 	.remove =	wm8962_remove,
 	.resume =	wm8962_resume,
 	.set_bias_level = wm8962_set_bias_level,
-	.reg_cache_size = WM8962_MAX_REGISTER,
+	.reg_cache_size = WM8962_MAX_REGISTER + 1,
 	.reg_word_size = sizeof(u16),
 	.reg_cache_default = wm8962_reg,
 	.volatile_register = wm8962_volatile_register,