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Add support init gains: MIC Gain ALC Gain (0dB: 0x06) Lineout Gain (0dB: 0x1a) 0dB (0x01) min: -9.0dB (0x00) min: -39.0dB (0x00) 20dB (0x02) max: +37.5dB (0x1f) max: +6.0dB (0x1f) 12dB (0x03) step: +1.5dB step: +1.5dB Signed-off-by: Xing Zheng <zhengxing@rock-chips.com> Change-Id: I827329e3b96c64a7a344dfc4094fea6d118503a5