[PATCH] spi: aspeed: Use devm_iounmap() to unmap devm_ioremap() memory

[Markus Elfring]

> The AHB IO memory for each chip select is mapped using
> devm_ioremap(), so it should be unmapped using devm_iounmap()
> to ensure proper device-managed resource cleanup.
…

* You may occasionally put more than 61 characters into text lines
  of such a change description.
  https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/tree/Documentation/process/submitting-patches.rst?h=v6.18-rc4#n658

* Would another imperative wording become helpful for an improved change description?
  https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/tree/Documentation/process/submitting-patches.rst?h=v6.18-rc4#n94


Regards,
Markus