plat-vexpress: use register_nsec_ddr()

Plat-vexpress uses register_nsec_ddr() to define the non-secure DDR
memory.

Reviewed-by: Volodymyr Babchuk <vlad.babchuk@gmail.com>
Reviewed-by: Etienne Carriere <etienne.carriere@linaro.org>
Signed-off-by: Jens Wiklander <jens.wiklander@linaro.org>

core/arch/arm/plat-vexpress/main.c

@@ -77,6 +77,7 @@ static struct gic_data gic_data;
 static struct pl011_data console_data;
 
 register_phys_mem(MEM_AREA_IO_SEC, CONSOLE_UART_BASE, PL011_REG_SIZE);
+register_nsec_ddr(DRAM0_BASE, DRAM0_SIZE);
 
 const struct thread_handlers *generic_boot_get_handlers(void)
 {