arm: juno: Enable SATA controller

The ARM Juno boards (-r1 and -r2) feature a Silicon Image 3132 PCIe
SATA controller soldered on the board, providing two SATA ports.

Enable the driver and the sata command in the defconfig, to be able to
load images from SATA disks.

Tested by loading kernels and Grub/EFI from an SSD and successfully
booting a Linux system (with and without using UEFI).
Signed-off-by: NAndre Przywara <andre.przywara@arm.com>
Reviewed-by: NLinus Walleij <linus.walleij@linaro.org>

configs/vexpress_aemv8a_juno_defconfig

@@ -29,14 +29,15 @@ CONFIG_CMD_USB=y
 CONFIG_CMD_CACHE=y
 # CONFIG_CMD_MISC is not set
 CONFIG_CMD_UBI=y
-# CONFIG_ISO_PARTITION is not set
-# CONFIG_EFI_PARTITION is not set
 CONFIG_OF_BOARD=y
 CONFIG_PCI=y
 CONFIG_DM_PCI=y
 CONFIG_PCIE_ECAM_GENERIC=y
 CONFIG_DM_PCI_COMPAT=y
 CONFIG_CMD_PCI=y
+CONFIG_LIBATA=y
+CONFIG_SATA_SIL=y
+CONFIG_CMD_SATA=y
 CONFIG_ENV_IS_IN_FLASH=y
 CONFIG_ENV_ADDR=0xBFC0000
 # CONFIG_MMC is not set