This matches any header not just the board name.

If the new version is not larger than the one given programming of
CFE is turned off.

So this will print status from dd to stderr. noisy but harmless.

Only complain on nvram parameter if we are actually burning to flash.

This so that we prevent programming an image for the wrong board.

when compiling for musl this option generated wanrings for stdio.h so
remove it for now.

I used a modified nandsim but to use an unmodified kernel ubiattach is
needed instead.

we use number for cfe since we need two mtd partitions so also
using number here make sense to keep it the same.

This caclulation only works on firmware ubifs images.

Also move variables into function.

Did not handle non number arguments errors.

No need to have a string for perror we already printed what we tried to do.
just print out the standard error string.

Only extract ubi image for now.

This can now write the kernel image on broadcom devices.

Only extract a modified image for now. The modification is in the filename of
"cferam.001" to whatever sequence number is selected by the option -s

ex
iop_upgrade -f last.y3 -s 6

Adding "-" to optstring is not having the intended effect.
So work on a pristine copy each time we call getopt instead.