armv8: ls2080aqds: Enable QSPI boot support

This patch adds QSPI boot support for LS2080AQDS board.
The QSPI boot image need to be programmed into the QSPI flash
first. Then we can switch to booting from QSPI memory space.

Signed-off-by: Yuan Yao <yao.yuan@nxp.com>
Reviewed-by: York Sun <york.sun@nxp.com>

configs/ls2080aqds_qspi_defconfig

@@ -0,0 +1,37 @@
+CONFIG_ARM=y
+CONFIG_TARGET_LS2080AQDS=y
+CONFIG_FIT=y
+CONFIG_FIT_VERBOSE=y
+CONFIG_OF_BOARD_SETUP=y
+CONFIG_OF_STDOUT_VIA_ALIAS=y
+CONFIG_SYS_EXTRA_OPTIONS="SYS_FSL_DDR4,QSPI_BOOT,LS2080A"
+CONFIG_BOOTDELAY=10
+CONFIG_HUSH_PARSER=y
+CONFIG_DEFAULT_DEVICE_TREE="fsl-ls2080a-qds"
+CONFIG_OF_CONTROL=y
+CONFIG_OF_EMBED=y
+CONFIG_DM=y
+CONFIG_DM_SPI_FLASH=y
+CONFIG_DM_SPI=y
+CONFIG_FSL_QSPI=y
+CONFIG_CMD_GREPENV=y
+CONFIG_CMD_MMC=y
+CONFIG_CMD_I2C=y
+CONFIG_CMD_USB=y
+# CONFIG_CMD_SETEXPR is not set
+CONFIG_CMD_DHCP=y
+CONFIG_CMD_MII=y
+CONFIG_CMD_PING=y
+CONFIG_CMD_CACHE=y
+CONFIG_CMD_EXT2=y
+CONFIG_CMD_FAT=y
+CONFIG_CMD_SF=y
+CONFIG_NET_RANDOM_ETHADDR=y
+CONFIG_NETDEVICES=y
+CONFIG_E1000=y
+CONFIG_SYS_NS16550=y
+CONFIG_USB=y
+CONFIG_USB_XHCI_HCD=y
+CONFIG_USB_XHCI_DWC3=y
+CONFIG_OF_LIBFDT=y
+CONFIG_EFI_LOADER_BOUNCE_BUFFER=y