kernel: move Toshiba-TC58NVG0S3H patch to ipq40xx redux

kernel: move Toshiba-TC58NVG0S3H patch to ipq40xx redux

Linux' upstream MTD-Maintainer Miquèl Raynal noted:
|Reverting seems the safest option here, not knowing how many devices
|have these damaged/counterfeit chips. If it is just a couple and only on
|Fritzboxes, as suggested in the Github issue this patch could be
|carried through OpenWrt and that would seem more future proof IMHO.

This patch follows up with the first patch. It actually
moves the patches out of target/linux/generic/pending into
the ipq40xx's patch heap and adds a little note what happend.

For more information, discussions or reports about bad TC58NVG0S3Hs,
please visit the OpenWrt's Github Issue #9962:
<https://github.com/openwrt/openwrt/issues/9962>

Signed-off-by: Christian Lamparter <chunkeey@gmail.com>