mtd/ftl: Use kmalloc_array() in build_maps()

[SF Markus Elfring]

> The indentation has been changed and the new one looks wrong...

The source code formatting contained various open issues before already.


> If you want to fix the indentation to make it compliant with the Linux
> coding style, do it on the whole file so every thing is uniform.

Such a development task is too much for me today.


> Reviewing such dummy/automatic patches is a pure waste of time,
> so personally I think we should just ignore them.

How much do you care for the usage of a function like “kmalloc_array”?

Regards,
Markus