arm64: versal: Add Xilinx Versal Virtual QEMU board

Virtual QEMU board is generating DTB self and putting it to
VERSAL_QEMU_DTB_ADDR address.
Board is using CONFIG_OF_BOARD which ensures that u-boot is aligned with
board created by QEMU.

Signed-off-by: Michal Simek <michal.simek@xilinx.com>
diff --git a/configs/xilinx_versal_virt_defconfig b/configs/xilinx_versal_virt_defconfig
new file mode 100644
index 0000000..668c313
--- /dev/null
+++ b/configs/xilinx_versal_virt_defconfig
@@ -0,0 +1,68 @@
+CONFIG_ARM=y
+CONFIG_ARCH_VERSAL=y
+CONFIG_SYS_TEXT_BASE=0x8000000
+CONFIG_SYS_MALLOC_F_LEN=0x8000
+CONFIG_DEBUG_UART_BASE=0xff000000
+CONFIG_DEBUG_UART_CLOCK=0
+CONFIG_COUNTER_FREQUENCY=62500000
+CONFIG_DEBUG_UART=y
+CONFIG_ENV_VARS_UBOOT_CONFIG=y
+CONFIG_FIT=y
+CONFIG_FIT_VERBOSE=y
+# CONFIG_ARCH_FIXUP_FDT_MEMORY is not set
+CONFIG_BOOTDELAY=-1
+CONFIG_SUPPORT_RAW_INITRD=y
+# CONFIG_DISPLAY_CPUINFO is not set
+CONFIG_BOARD_EARLY_INIT_R=y
+CONFIG_HUSH_PARSER=y
+CONFIG_SYS_PROMPT="Versal> "
+CONFIG_CMD_BOOTMENU=y
+CONFIG_CMD_MEMTEST=y
+CONFIG_SYS_ALT_MEMTEST=y
+# CONFIG_CMD_FLASH is not set
+CONFIG_CMD_MMC=y
+CONFIG_CMD_SF=y
+CONFIG_CMD_DHCP=y
+CONFIG_CMD_TFTPPUT=y
+CONFIG_CMD_MII=y
+CONFIG_CMD_PING=y
+CONFIG_CMD_PXE=y
+CONFIG_CMD_CACHE=y
+CONFIG_CMD_TIME=y
+CONFIG_CMD_TIMER=y
+CONFIG_CMD_EXT2=y
+CONFIG_CMD_EXT4=y
+CONFIG_CMD_EXT4_WRITE=y
+CONFIG_CMD_FAT=y
+CONFIG_CMD_FS_GENERIC=y
+CONFIG_ISO_PARTITION=y
+CONFIG_EFI_PARTITION=y
+# CONFIG_PARTITION_UUIDS is not set
+CONFIG_OF_BOARD=y
+CONFIG_NET_RANDOM_ETHADDR=y
+CONFIG_SPL_DM_SEQ_ALIAS=y
+CONFIG_DM_GPIO=y
+CONFIG_DM_MMC=y
+CONFIG_MMC_SDHCI=y
+CONFIG_MMC_SDHCI_ZYNQ=y
+CONFIG_DM_SPI_FLASH=y
+CONFIG_SPI_FLASH=y
+CONFIG_SPI_FLASH_BAR=y
+CONFIG_SPI_FLASH_MACRONIX=y
+CONFIG_SPI_FLASH_SPANSION=y
+CONFIG_SPI_FLASH_STMICRO=y
+CONFIG_SPI_FLASH_SST=y
+CONFIG_SPI_FLASH_WINBOND=y
+# CONFIG_SPI_FLASH_USE_4K_SECTORS is not set
+CONFIG_PHY_FIXED=y
+CONFIG_DM_ETH=y
+CONFIG_PHY_GIGE=y
+CONFIG_MII=y
+CONFIG_ZYNQ_GEM=y
+CONFIG_DEBUG_UART_PL011=y
+CONFIG_DEBUG_UART_ANNOUNCE=y
+CONFIG_PL01X_SERIAL=y
+CONFIG_SPI=y
+CONFIG_DM_SPI=y
+CONFIG_FAT_WRITE=y
+CONFIG_EFI_LOADER_BOUNCE_BUFFER=y