sunxi: Set DCDC1 to 3.3V on the Sinovoip BPI M3

This is the value used in the fex file of the manufacturer images,
and also the DCDC1 default. Sometimes lower values are used to save
battery power, but that does not apply to a SBC.

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

configs/Sinovoip_BPI_M3_defconfig

@@ -12,5 +12,4 @@ CONFIG_SPL=y
 # CONFIG_CMD_IMLS is not set
 # CONFIG_CMD_FLASH is not set
 # CONFIG_CMD_FPGA is not set
-CONFIG_AXP_DCDC1_VOLT=3000
 CONFIG_AXP_DCDC5_VOLT=1200