sunxi: power: Columbus: only enable ELDO3 when necessary

ELDO3 is only necessary when using the lcd-panel, and not when using hdmi,
the display code already takes care of enabling ELDO3 when necessary,
so there is no need to permanently enable it in the deconfig.

Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Acked-by: Ian Campbell <ijc@hellion.org.uk>

configs/Colombus_defconfig

@@ -23,5 +23,4 @@ CONFIG_SYS_EXTRA_OPTIONS="SUNXI_GMAC,RGMII"
 # CONFIG_CMD_FPGA is not set
 CONFIG_ETH_DESIGNWARE=y
 CONFIG_AXP_ALDO1_VOLT=3300
-CONFIG_AXP_ELDO3_VOLT=1800
 CONFIG_USB_EHCI_HCD=y