ST7571_SET_POWER
ST7571_SET_POWER(0x4), /* Power Control, VC: ON, VR: OFF, VF: OFF */
ST7571_SET_POWER(0x6), /* Power Control, VC: ON, VR: ON, VF: OFF */
ST7571_SET_POWER(0x7), /* Power Control, VC: ON, VR: ON, VF: ON */
ST7571_SET_POWER(0x4), /* Power Control, VC: ON, VR: OFF, VF: OFF */
ST7571_SET_POWER(0x6), /* Power Control, VC: ON, VR: ON, VF: OFF */
ST7571_SET_POWER(0x7), /* Power Control, VC: ON, VR: ON, VF: ON */