imx8qxp: add SPL NAND container build target

Support building image for SPL NAND booting using container for u-boot,
atf and optee.
Signed-off-by: Ye Li <ye.li@nxp.com>

iMX8QX/soc.mak

@@ -223,6 +223,13 @@ flash_nand_spl: $(MKIMG) mx8qx-ahab-container.img scfw_tcm.bin u-boot-atf.bin u-
                    echo "append u-boot-atf.bin at $$((pad_cnt * page))  a $$pad_cnt b $$page KB"; \
                    dd if=u-boot-atf.bin of=flash.bin bs=1K seek=$$((pad_cnt * page))
 
+flash_spl_nand_container: $(MKIMG) mx8qx-ahab-container.img scfw_tcm.bin u-boot-spl.bin u-boot-atf-container.img
+	./$(MKIMG) -soc QX -rev B0 -dev nand 16K -dcd skip -append mx8qx-ahab-container.img -c -scfw scfw_tcm.bin -ap u-boot-spl.bin a35 0x00100000 -out flash.bin
+	@flashbin_size=`wc -c flash.bin | awk '{print $$1}'`; \
+                   pad_cnt=$$(((flashbin_size + 0x4000 - 1) / 0x4000)); page=16;\
+                   echo "append u-boot-atf-container.img at $$((pad_cnt * page))  a $$pad_cnt b $$page KB"; \
+                   dd if=u-boot-atf-container.img of=flash.bin bs=1K seek=$$((pad_cnt * page))
+
 flash_all flash_b0_all: $(MKIMG) mx8qx-ahab-container.img scfw_tcm.bin u-boot-atf.bin CM4.bin
 	./$(MKIMG) -soc QX -rev B0 -append mx8qx-ahab-container.img -c -scfw scfw_tcm.bin -ap u-boot-atf.bin a35 0x80000000 -m4 CM4.bin 0 0x34FE0000 -out flash.bin