sunxi: Olimex A20 boards: Enable LDO3 and LDO4 regulators

Sets LDO3 and LDO4 regulators at 2.8V. In the current config
these are off. This causes kernel to hang during
axp209 initialization.
Signed-off-by: NStefan Mavrodiev <stefan.mavrodiev@gmail.com>
Acked-by: NHans de Goede <hdegoede@redhat.com>
Signed-off-by: NHans de Goede <hdegoede@redhat.com>

configs/A20-OLinuXino_MICRO_defconfig

@@ -15,3 +15,5 @@ CONFIG_SYS_EXTRA_OPTIONS="SUNXI_GMAC,AHCI,SATAPWR=SUNXI_GPB(8)"
 # CONFIG_CMD_FPGA is not set
 CONFIG_ETH_DESIGNWARE=y
 CONFIG_USB_EHCI_HCD=y
+CONFIG_AXP_ALDO3_VOLT=2800
+CONFIG_AXP_ALDO4_VOLT=2800

configs/A20-Olimex-SOM-EVB_defconfig

@@ -18,3 +18,5 @@ CONFIG_SYS_EXTRA_OPTIONS="SUNXI_GMAC,RGMII,AHCI,SATAPWR=SUNXI_GPC(3)"
 CONFIG_RTL8211X_PHY_FORCE_MASTER=y
 CONFIG_ETH_DESIGNWARE=y
 CONFIG_USB_EHCI_HCD=y
+CONFIG_AXP_ALDO3_VOLT=2800
+CONFIG_AXP_ALDO4_VOLT=2800