mtd/spinand: sync core spinand code with linux-5.10.118

This brings us closer to the current Linux kernel implementation of
the spinand core and makes backporting features and fixes easier.

This does not include the latest kernel implementation as this would
require a substantial amount of extra work due to the missing
ECC engine abstraction layer in U-Boot.

Signed-off-by: Mikhail Kshevetskiy <mikhail.kshevetskiy@iopsys.eu>
Signed-off-by: Frieder Schrempf <frieder.schrempf@kontron.de> (add commit message)
Link: https://lore.kernel.org/all/20230110115843.391630-2-frieder@fris.de


Signed-off-by: Dario Binacchi <dario.binacchi@amarulasolutions.com>