[RESEND PATCH] ARM: dts: ls1021a: Add support for QSPI with ls1021a SoC

[SZ Lin (林上智)]

> Add QSPI node support, and this function is disabled by default This setting could be overwritten > in board-level definitions
> 
> Signed-off-by: SZ Lin <sz.lin at moxa.com>
> ---

This is a resend patch [1]. Any feedback would be greatly appreciated!

ref:
[1]: https://patchwork.kernel.org/patch/9889431/

Best regards,
SZ Lin