sunxi: enable SATA on Banana Pi M2 Ultra

Banana Pi M2 Ultra has a SATA port connected to the internal SATA
controller of R40 SoC. The controller's 1.2v VDD is connected to ELDO3
and the 2.5v VDD is connected to DLDO4.

Enable these regulators as well as the SATA support of Banana Pi M2
Ultra, by adding needed config lines into its defconfig.

Signed-off-by: Icenowy Zheng <icenowy@aosc.io>
Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>

configs/Bananapi_M2_Ultra_defconfig

@@ -7,9 +7,12 @@ CONFIG_DRAM_ODT_EN=y
 CONFIG_MMC0_CD_PIN="PH13"
 CONFIG_MMC_SUNXI_SLOT_EXTRA=2
 CONFIG_DEFAULT_DEVICE_TREE="sun8i-r40-bananapi-m2-ultra"
+CONFIG_AHCI=y
 # CONFIG_SYS_MALLOC_CLEAR_ON_INIT is not set
 CONFIG_SPL=y
 CONFIG_SPL_I2C_SUPPORT=y
 # CONFIG_CMD_IMLS is not set
 # CONFIG_CMD_FLASH is not set
 # CONFIG_CMD_FPGA is not set
+CONFIG_AXP_DLDO4_VOLT=2500
+CONFIG_AXP_ELDO3_VOLT=1200