board: tqma7: add code for u-boot with spl

The TQMa7x is a SoM family with a pluggable board connector based on the
i.MX7 SoCs. Add support for the SoM and its combination with our
MBa7x carrier board.

Acked-by: Peng Fan <peng.fan@nxp.com>
Signed-off-by: Alexander Feilke <alexander.feilke@ew.tq-group.com>

include/env/tq/spi.env

@@ -20,4 +20,8 @@ update_uboot_spi=
 		fi;
 	fi;
 
+#ifdef CONFIG_CMD_QSPIHDR
+write_uboot_spi=qspihdr init ${loadaddr} ${filesize} safe;
+#else
 write_uboot_spi=sf update "${loadaddr}" "${uboot_spi_start}" "${filesize}"
+#endif