sunxi: Enable AXP818 SW for Sinovoip BPI M3

The SW output of the PMIC supplies the ethernet PHY with power.

Signed-off-by: Chen-Yu Tsai <wens@csie.org>
Reviewed-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Hans de Goede <hdegoede@redhat.com>

configs/Sinovoip_BPI_M3_defconfig

@@ -30,5 +30,6 @@ CONFIG_CMD_FAT=y
 CONFIG_CMD_FS_GENERIC=y
 CONFIG_AXP_DCDC5_VOLT=1200
 CONFIG_AXP_DLDO3_VOLT=2500
+CONFIG_AXP_SW_ON=y
 CONFIG_USB_EHCI_HCD=y
 CONFIG_USB_MUSB_HOST=y