Is register address error?

[mfcjck]

linux-3.4/sound/soc/sunxi/audiocodec/sun8iw7_sndcodec.c
The register address named AC_DAC_TXDATA is 0x0c.

But Ref: Allwinner_H3_datasheet_v1.0.pdf the register address is 0x020.

The code in sun8iw7_sndcodec.c.
#define DAC_TX_DATA 0x0c

Is need fix the address 0x0c to 0x20?