[PATCH] RISC-V: virt: riscvemu: fix unit address in node name

[Marco Felsch]

On 23-02-02, Ahmad Fatoum wrote:
> The overlay adds a SRAM at address 0x1000, but the unit address was
> still 0, which is confusing. Change it to sram at 1000 instead.
> 
> Reported-by: Marco Felsch <m.felsch at pengutronix.de>
> Signed-off-by: Ahmad Fatoum <ahmad at a3f.at>

Reviewed-by: Marco Felsch <m.felsch at pengutronix.de>