hammerhead: Increase headphones RX1/RX2 volume
hammerhead: Increase headphones RX1/RX2 volume

- RX1/RX2 Digital Volume : 82 -> 83

Change-Id: Ib0ab437d9cba1b551779d370581ad1f89218dad8

maruos/android_device_lge_hammerhead,maruos/android_device_lge_hammerhead,maruos/android_device_lge_hammerhead,maruos/android_device_lge_hammerhead