warp7: include: configs: Specify an fdtovaddr

In the Mbed Linux OS bootflow OP-TEE runs before u-boot and provides a DTB
overlay at 0x83100000.

This overlay should subsequently be merged into the main DTB before handing
over to the kernel.

This patch defines fdtovaddr at 0x83100000.
Signed-off-by: NBryan O'Donoghue <bryan.odonoghue@linaro.org>

include/configs/warp7.h

@@ -47,6 +47,7 @@
 	"initrd_high=0xffffffff\0" \
 	"fdt_file=imx7s-warp.dtb\0" \
 	"fdt_addr=" __stringify(CONFIG_SYS_FDT_ADDR)"\0" \
+	"fdtovaddr=0x83100000\0" \
 	"optee_addr=" __stringify(CONFIG_OPTEE_LOAD_ADDR)"\0" \
 	"boot_fdt=try\0" \
 	"ip_dyn=yes\0" \