arm: ls1021atwr: Add SD secure boot target

Add SD secure boot target for ls1021atwr.
Implement board specific spl_board_init() to setup CAAM stream ID and
corresponding stream ID in SMMU. Change the u-boot size defined by a
macro for copying the main U-Boot by SPL to also include the u-boot
Secure Boot header size as header is appended to u-boot image. So header
will also be copied from SD to DDR.

Reviewed-by: Aneesh Bansal <aneesh.bansal@nxp.com>
Signed-off-by: Sumit Garg <sumit.garg@nxp.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
Reviewed-by: York Sun <york.sun@nxp.com>

configs/ls1021atwr_sdcard_ifc_SECURE_BOOT_defconfig

@@ -0,0 +1,31 @@
+CONFIG_ARM=y
+CONFIG_TARGET_LS1021ATWR=y
+CONFIG_SPL=y
+CONFIG_OF_BOARD_SETUP=y
+CONFIG_OF_STDOUT_VIA_ALIAS=y
+CONFIG_SYS_EXTRA_OPTIONS="RAMBOOT_PBL,SPL_FSL_PBL,SD_BOOT,SECURE_BOOT"
+CONFIG_BOOTDELAY=0
+CONFIG_HUSH_PARSER=y
+CONFIG_CMD_BOOTZ=y
+CONFIG_CMD_GREPENV=y
+CONFIG_CMD_MEMTEST=y
+CONFIG_CMD_MEMINFO=y
+CONFIG_CMD_MMC=y
+CONFIG_CMD_I2C=y
+CONFIG_CMD_USB=y
+CONFIG_CMD_DHCP=y
+CONFIG_CMD_MII=y
+CONFIG_CMD_PING=y
+CONFIG_CMD_EXT2=y
+CONFIG_CMD_FAT=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_FIT=y
+CONFIG_FIT_VERBOSE=y
+CONFIG_RSA=y
+CONFIG_DM=y