Kernel warns about comparision of different types without cast when
building the fitblk driver on 32-bit platforms.
Fix this by using `min_t(size_t, ...`.
Fixes: 8fc5457869 ("kernel: add pending fitblk uImage.FIT sub-image block driver")
Signed-off-by: Daniel Golle <daniel@makrotopia.org>
Add 'fitblk' driver to replace the rejected/deprecated uImage.FIT
partition parser.
To use the new driver, add phandle /chosen/rootdisk and point it to
the MTD partition, UBI volume or block device holding the uImage.FIT.
Signed-off-by: Daniel Golle <daniel@makrotopia.org>
